1. The document assesses mangrove deforestation using machine learning algorithms applied to pixel-based images. It examines random forest (RF), support vector machine (SVM), decision tree (DT), and object-based nearest neighbors algorithms to classify mangrove forests in seven provinces in Thailand's Gulf of Thailand.
2. SVM with a radial basis function resulted in an overall accuracy of 96.83%. RF performed better than other algorithms when orthophotography was not available.
3. The study aims to provide features of tree cover loss, above-ground carbon dioxide emissions, and above-ground biomass loss for 2001-2019 using the machine learning algorithms.
Algorithm for detecting deforestation and forest degradation using vegetation...TELKOMNIKA JOURNAL
In forestry sector, the remote sensing technology hold a key role on forest inventory and
monitoring their changes. This paper describes the algorithm for detecting deforestation and forest
degradation using high resolution satellite imageries with knowledge-based approach. The main objective
of the study is to develop a practical technique for monitoring deforestation and forest degradation
occurred within the mangrove and swamp forest ecosystem. The SPOT 4, 5, and 6 images acquired in
2007, 2012 and 2014 were transformed into three vegetation indices, i.e., Normalized Difference
Vegetation Index (NDVI), Green-Normalized Difference Vegetation index (GNDVI) and Normalized
Green-Red Vegetation index (NRGI). The study found that deforestation was well detected and identified
using the NDVI and GNDVI, however the forest degradation could be well detected using NRGI, better
than NDVI and GNDVI. The study concludes that the strategy for monitoring deforestation, biomass-based
forest degradation as well as forest growth could be done by combining the use of NDVI, GNDVI and
NRGI respectively.
Measuring Individual Tree Height and Crown Diameter for Mangrove Trees with A...INFOGAIN PUBLICATION
Mangroves are unique ecosystems that provide valuable coastal area habitats, protection, and services. Access to observing mangrove forests is typically difficult on the ground. Therefore, it is of interest to develop and evaluate remote sensing methods that enable us to obtain accurate information on the structure of mangrove forests and to monitor their condition in time. The main objective of this study was to develop a methodology for processing airborne lidar data for measuring height and crown diameter for mangrove forests in the north-eastern coastal areas of Brazil. Specific objectives were to: (1) evaluate the most appropriate lidar data processing approach, such as area-based or individual tree methods, (2) investigate the most appropriate parameters for lidar-derived data products when estimating height and crown diameter, such as the spatial resolution of canopy height models and ground elevation models; and (3) compare the accuracy of lidar estimates to field measurements of height and crown diameter. The lidar dataset was acquired over mangrove forest of the northeast of Brazil. The crown diameter was calculated as the average of two values measured along two perpendicular directions from the location of each tree top by fitting a fourth-degree polynomial on both profiles. The lidar-derived tree measurements were used with regression models and cross-validation to estimate plot level field-measured crown diameter. Root mean square error, linear regression and the Nash-Sutcliffe coefficient were also used to compare lidar height and field height. The mean of lidar-estimated tree height was 9,48m and the mean of field tree height was 8.44m. The correlation between lidar tree height and field tree height was r= 0.60, E=-0.06 and RMSE= 2.8. The correlation between height and crown diameter needed to parameterized the individual tree identification software obtained for 32 trees was r= 0.83 and determination coefficient was r2 = 0.69. The results of the current study show that lidar data could be used to estimate height and average crown diameter of mangrove trees and to improve estimates of other mangrove forest biophysical parameters of interest by focusing at the individual tree level. The research presented in this study contributes to the overall knowledge of using lidar remote sensing to measure and monitor mangrove forests.
Soil Classification Using Image Processing and Modified SVM Classifierijtsrd
Recently the use of soil classification has gained more and more importance and recent direction in research works indicates that image classification of images for soil information is the preferred choice. Various methods for image classification have been developed based on different theories or models. In this study, three of these methods Maximum Likelihood classification MLC , Sub pixel classification SP and Support Vector machine SVM are used to classify a soil image into seven soil classes and the results compared. MLC and SVM are hard classification methods but SP is a soft classification. Hardening of soft classifications for accuracy determination leads to loss of information and the accuracy may not necessary represent the strength of class membership. Therefore, in the comparison of the methods, the top 20 compositions per soil class of the SP were used instead. Results from the classification, indicated that output from SP was generally poor although it performs well with soils such as forest that are homogeneous in character. Of the two hard classifiers, SVM gave a better output than MLC. Priyanka Dewangan | Vaibhav Dedhe "Soil Classification Using Image Processing and Modified SVM Classifier" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-6 , October 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18489.pdf
Alertas Tempranas de Pérdida de Bosques tropicales en Perú usando LandsatAlejandro Leon
Desde el 16 de marzo del 2017 el Programa Nacional de Conservación de Bosques para la Mitigación del Cambio Climático (PNCBMCC) del Ministerio del Ambiente de Perú (MINAM) viene implementando una metodología para la detección de alertas tempranas de la pérdida de cobertura de bosques húmedos tropicales de Perú, la detección se hace cada semana usando imágenes de Landsat 7 y 8 calibradas a reflectancia al tope de la atmosfera (TOA). La cobertura de nubes, neblina y sombra son enmascaradas de las imágenes y para la detección de la pérdida de cobertura de bosque se desarrolló una técnica de análisis de mixtura espectral (SMA) que denominamos desmezcla espectral directa (DSU), el modelo de desmezcla espectral fue construido a partir de los endmembers de bosque primario y la pérdida de cobertura de bosques. Se detectó hasta un 25% de pérdida de cobertura de bosque dentro de un pixel de Landsat. Hasta el 25 de diciembre del 2017 se usaron 500 imágenes Landsat y se detectaron 137 142.99 ha de pérdida de cobertura de bosques húmedos tropicales, esta pérdida incluye la deforestación por expansión agropecuaria, actividades extractivas ilegales o informales, que puede incluir la apertura de caminos para la tala selectiva, se detecta de igual forma las pérdida natural de bosques producida por vientos huracanados, deslizamientos de tierra en áreas montañosas con fuerte pendiente, entre otros. Los resultados fueron verificados con imágenes satelitales de alta resolución espacial, sobrevuelos y trabajo de campo. La evaluación de la exactitud se realizó utilizando un método de muestreo estratificado aleatorio, obteniéndose una alta precisión de usuario y productor. Las alertas tempranas de pérdida de bosques se distribuyen y están disponibles en la plataforma geobosques (http://geobosques.minam.gob.pe/geobosque/visor/index.php)
Paddy field classification with MODIS-terra multi-temporal image transformati...IJECEIAES
This paper presents the paddy field classification model using the approach based on periodic plant life cycle events and how these elevations in climate as well as habitat factors, such as elevation. The data used are MODIS-Terra two tiles of H28v09 and H29v09 of 2016, consist of 46 series of 8-daily data, with 500 meter resolution in Java region. The paddy field classification method based on the phenological model is done by Maximum Likelihood on the transformed annual multi-temporal image of the reflectance data, index data, and the combination of reflectance and index data. The results of the study showed that, with the reference of the Paddy Field Map from the Ministry of Agriculture (MoA), the overall accuracies of the paddy field classification results using the combination of reflectance and index data provide the highest (85.4%) among the reflectance data (83.5%) and index data (81.7%). The accuracy levels were varied; these depend on the slope and the types of paddy fields. Paddy fields on the slopes of 0-2% could be well identified by MODIS-Terra data, whereas it was difficult to identify the paddy fields on the slope >2%. Rain-fed lowland paddy field type has a lower user accuracy than irrigated paddy fields. This study also performed correlation (r2) between the analysis results and the statistical data based on district and provincial boundaries were >0.85 and >0.99 respectively. These correlations were much higher than the previous study results, which reached 0.49-0.65 (hilly-flat areas of county-level), and 0.80-0.88 (hilly-flat areas of provincial level) for China, and reached 0.44 for Indonesia.
Algorithm for detecting deforestation and forest degradation using vegetation...TELKOMNIKA JOURNAL
In forestry sector, the remote sensing technology hold a key role on forest inventory and
monitoring their changes. This paper describes the algorithm for detecting deforestation and forest
degradation using high resolution satellite imageries with knowledge-based approach. The main objective
of the study is to develop a practical technique for monitoring deforestation and forest degradation
occurred within the mangrove and swamp forest ecosystem. The SPOT 4, 5, and 6 images acquired in
2007, 2012 and 2014 were transformed into three vegetation indices, i.e., Normalized Difference
Vegetation Index (NDVI), Green-Normalized Difference Vegetation index (GNDVI) and Normalized
Green-Red Vegetation index (NRGI). The study found that deforestation was well detected and identified
using the NDVI and GNDVI, however the forest degradation could be well detected using NRGI, better
than NDVI and GNDVI. The study concludes that the strategy for monitoring deforestation, biomass-based
forest degradation as well as forest growth could be done by combining the use of NDVI, GNDVI and
NRGI respectively.
Measuring Individual Tree Height and Crown Diameter for Mangrove Trees with A...INFOGAIN PUBLICATION
Mangroves are unique ecosystems that provide valuable coastal area habitats, protection, and services. Access to observing mangrove forests is typically difficult on the ground. Therefore, it is of interest to develop and evaluate remote sensing methods that enable us to obtain accurate information on the structure of mangrove forests and to monitor their condition in time. The main objective of this study was to develop a methodology for processing airborne lidar data for measuring height and crown diameter for mangrove forests in the north-eastern coastal areas of Brazil. Specific objectives were to: (1) evaluate the most appropriate lidar data processing approach, such as area-based or individual tree methods, (2) investigate the most appropriate parameters for lidar-derived data products when estimating height and crown diameter, such as the spatial resolution of canopy height models and ground elevation models; and (3) compare the accuracy of lidar estimates to field measurements of height and crown diameter. The lidar dataset was acquired over mangrove forest of the northeast of Brazil. The crown diameter was calculated as the average of two values measured along two perpendicular directions from the location of each tree top by fitting a fourth-degree polynomial on both profiles. The lidar-derived tree measurements were used with regression models and cross-validation to estimate plot level field-measured crown diameter. Root mean square error, linear regression and the Nash-Sutcliffe coefficient were also used to compare lidar height and field height. The mean of lidar-estimated tree height was 9,48m and the mean of field tree height was 8.44m. The correlation between lidar tree height and field tree height was r= 0.60, E=-0.06 and RMSE= 2.8. The correlation between height and crown diameter needed to parameterized the individual tree identification software obtained for 32 trees was r= 0.83 and determination coefficient was r2 = 0.69. The results of the current study show that lidar data could be used to estimate height and average crown diameter of mangrove trees and to improve estimates of other mangrove forest biophysical parameters of interest by focusing at the individual tree level. The research presented in this study contributes to the overall knowledge of using lidar remote sensing to measure and monitor mangrove forests.
Soil Classification Using Image Processing and Modified SVM Classifierijtsrd
Recently the use of soil classification has gained more and more importance and recent direction in research works indicates that image classification of images for soil information is the preferred choice. Various methods for image classification have been developed based on different theories or models. In this study, three of these methods Maximum Likelihood classification MLC , Sub pixel classification SP and Support Vector machine SVM are used to classify a soil image into seven soil classes and the results compared. MLC and SVM are hard classification methods but SP is a soft classification. Hardening of soft classifications for accuracy determination leads to loss of information and the accuracy may not necessary represent the strength of class membership. Therefore, in the comparison of the methods, the top 20 compositions per soil class of the SP were used instead. Results from the classification, indicated that output from SP was generally poor although it performs well with soils such as forest that are homogeneous in character. Of the two hard classifiers, SVM gave a better output than MLC. Priyanka Dewangan | Vaibhav Dedhe "Soil Classification Using Image Processing and Modified SVM Classifier" Published in International Journal of Trend in Scientific Research and Development (ijtsrd), ISSN: 2456-6470, Volume-2 | Issue-6 , October 2018, URL: http://www.ijtsrd.com/papers/ijtsrd18489.pdf
Alertas Tempranas de Pérdida de Bosques tropicales en Perú usando LandsatAlejandro Leon
Desde el 16 de marzo del 2017 el Programa Nacional de Conservación de Bosques para la Mitigación del Cambio Climático (PNCBMCC) del Ministerio del Ambiente de Perú (MINAM) viene implementando una metodología para la detección de alertas tempranas de la pérdida de cobertura de bosques húmedos tropicales de Perú, la detección se hace cada semana usando imágenes de Landsat 7 y 8 calibradas a reflectancia al tope de la atmosfera (TOA). La cobertura de nubes, neblina y sombra son enmascaradas de las imágenes y para la detección de la pérdida de cobertura de bosque se desarrolló una técnica de análisis de mixtura espectral (SMA) que denominamos desmezcla espectral directa (DSU), el modelo de desmezcla espectral fue construido a partir de los endmembers de bosque primario y la pérdida de cobertura de bosques. Se detectó hasta un 25% de pérdida de cobertura de bosque dentro de un pixel de Landsat. Hasta el 25 de diciembre del 2017 se usaron 500 imágenes Landsat y se detectaron 137 142.99 ha de pérdida de cobertura de bosques húmedos tropicales, esta pérdida incluye la deforestación por expansión agropecuaria, actividades extractivas ilegales o informales, que puede incluir la apertura de caminos para la tala selectiva, se detecta de igual forma las pérdida natural de bosques producida por vientos huracanados, deslizamientos de tierra en áreas montañosas con fuerte pendiente, entre otros. Los resultados fueron verificados con imágenes satelitales de alta resolución espacial, sobrevuelos y trabajo de campo. La evaluación de la exactitud se realizó utilizando un método de muestreo estratificado aleatorio, obteniéndose una alta precisión de usuario y productor. Las alertas tempranas de pérdida de bosques se distribuyen y están disponibles en la plataforma geobosques (http://geobosques.minam.gob.pe/geobosque/visor/index.php)
Paddy field classification with MODIS-terra multi-temporal image transformati...IJECEIAES
This paper presents the paddy field classification model using the approach based on periodic plant life cycle events and how these elevations in climate as well as habitat factors, such as elevation. The data used are MODIS-Terra two tiles of H28v09 and H29v09 of 2016, consist of 46 series of 8-daily data, with 500 meter resolution in Java region. The paddy field classification method based on the phenological model is done by Maximum Likelihood on the transformed annual multi-temporal image of the reflectance data, index data, and the combination of reflectance and index data. The results of the study showed that, with the reference of the Paddy Field Map from the Ministry of Agriculture (MoA), the overall accuracies of the paddy field classification results using the combination of reflectance and index data provide the highest (85.4%) among the reflectance data (83.5%) and index data (81.7%). The accuracy levels were varied; these depend on the slope and the types of paddy fields. Paddy fields on the slopes of 0-2% could be well identified by MODIS-Terra data, whereas it was difficult to identify the paddy fields on the slope >2%. Rain-fed lowland paddy field type has a lower user accuracy than irrigated paddy fields. This study also performed correlation (r2) between the analysis results and the statistical data based on district and provincial boundaries were >0.85 and >0.99 respectively. These correlations were much higher than the previous study results, which reached 0.49-0.65 (hilly-flat areas of county-level), and 0.80-0.88 (hilly-flat areas of provincial level) for China, and reached 0.44 for Indonesia.
To meet the various information requirements in forest management, different data sources like field survey, aerial photography, and satellite imagery is used, depending on the level of detail required and the extension of the area under study.
Myanmar is one of the most forested countries in mainland South-east Asia. These forests support a large number of important species and endemics and have great value for global efforts in biodiversity conservation.
study and analysis of hy si data in 400 to 500IJAEMSJORNAL
The ability to extract information about world and present it in way that our visual perception can comprehend is ultimate goal of imaging science in remote sensing .Hyperspectral imaging system is most powerful tool in the field of remote sensing also called as imaging spectroscopy, It is new technique used by researcher to detect terrestrial, vegetation and mineral. This paper reports analysis of hyperspectral images. Firstly the hyperspectral image analyzed by using supervised classification of Amravati region from Maharashtra province of India. The report reveals spectral analysis of Amravati region. We acquired satellite imagery to perform the classification using maximum like hood classifier. Analysis is performing in ERDAS to determine the spectral reflectance against the no of band. The analytical outcome of paper is representing the soil, water, vegetation index of the region.
INTEGRATED TECHNOLOGY OF DATA REMOTE SENSING AND GIS TECHNIQUES ASSESS THE LA...acijjournal
The present study focuses on the nature and pattern of urban expansion of Madurai city over its
surrounding region during the period from 2003 to 2013. Based on Its proximity to the Madurai city,
Preparation of various thematic data such Land use and Land cover using Land sat data. Create a land
use land cover map from satellite imagery using supervised classification. Find out the areas from the
classified data. The study is Based on secondary data, the satellite imagery has downloaded from GLCF
(Global Land Cover Facility) web site, for the study area (path101 row 67), the downloaded imagery
Subset using Imagery software to clip the study area. The clipped satellite imagery has Send to prepare the
land use and land cover map using supervised classification.
Android mobile application for wildfire reporting and monitoringriyaniaes
Peat fires cause major environmental problems in Central Kalimantan Province, Indonesia and threaten human health and effect the social-economic sector. The lack of peat fire detection systems is one factor that causing these reoccurring fires. Therefore, in this study, we develop an Android mobile platform application and a web-based application to support the citizen-volunteers who want to contribute wildfires reports, and the decision-makers who wish to collect, visualize, and evaluate these wildfires reports. In this paper, the global navigation satellite system (GNSS) and a global position system (GPS) sensor from a smartphone’s camera, is a useful tool to show the potential fire and smoke’s close-range location. The exchangeable image (EXIF) file image and GPS metadata captured by a mobile phone can store and supply raw observation to our devices and sent it to the data center through global internet communication. This work’s results are the proposed application easy-to-use to monitoring potential peat fire by location and data activity. This paper focuses on developing an application for the mobile platform for peat fire reporting and a web-based application to collect peat fire location for decision-makers. Our main objective is to detect the potential and spread of fire in peatlands as early as possible by utilizing community reports using smartphones.
Mapping and Monitoring Spatial-Temporal Cover Change of Prosopis Species Colo...inventionjournals
ABSTRACT: This study integrates Gis and remote sensing to detect, quantify and monitor the rate at which Prosopis species colonization has been taking place since its introduction. Multi-date Landsat 30m resolution imageries covering a period of 25 years were classified into four classes i.e. Prosopis species dominated canopy, mixed woodland, grass land and bush land and finally bare land and agricultural fields. Change detection analysis was performed using 10% threshold to identify and quantify areas where change or No change has occurred. The results indicate that the area under bare land and agricultural fields decreased at a rate of 18.22% per year from 29% in 1985 to 3% in 1990. Between 2005 and 2010 it decreased from 9% in 2005 to 5% in 2010 at a rate of 8.94% per year. Prosopis species colonization has been increasing since 1985 where it was at 0% increasing to 51% in 1990 at a rate of 58.18% per year. Between 2005 and 2010 it decreased from 56% in 2005 to stand at 44% in 2010 at a rate of 4.34% per year. The study found out that there is no threat of desertification in the study area as a result of Prosopis species colonizing the landscape. More studies to be done to identify sustainable method of controlling Prosopis species colonization to avoid more loss of agricultural land and grazing fields.
Remote sensing and GIS application for monitoring drought vulnerability in In...riyaniaes
Agricultural drought is one of the hydrometeorological disasters that cause significant losses because it affects food stocks. In addition, agricultural droughts, impact the physical and socio-economic development of the community. Remote sensing technology is used to monitor agricultural droughts spatially and temporally for minimizing losses. This study reviewed the literatures related to remote sensing and GIS for monitoring drought vulnerability in Indonesia. The study was conducted on an island-scale on Java Island, a provincial-scale in East Java and Bali, and a district-scale in Indramayu and Kebumen. The dominant method was the drought index, which involves variable land surface temperature (LST), vegetation index, land cover, wetness index, and rainfall. Each study has a strong point and a weak point. Low-resolution satellite imagery has been used to assess drought vulnerability. At the island scale, it provides an overview of drought conditions, while at the provincial scale, it focuses on paddy fields and has little detailed information. In-situ measurements at the district scale detect meteorological drought accurately, but there were limitations in the mapping unit's detailed information. Drought mapping using GIS and remote sensing at the district scale has detailed spatial information on climate and physiographic aspects, but it needs temporal data monitoring.
Spatial analysis for the assessment of the environmental changes in the lands...Universität Salzburg
Presented research is focused on the spatial analysis aimed at the assessment of the environmental changes in the landscapes of Izmir surroundings, Turkey. Methods include Landsat TM images classification using Erdas Imagine, clustering segmentation and classification, verification via the Google Earth and GIS Mapping. Tme span is 13-years (1987-2000). Images were taken from the Global Land Cover Facility (GLCF) Earth Science Data Interface. The selected area of Izmir has the most diverse landscape structure and high heterogeneity of the land cover types. Accuracy results computed. Kappa statistics for the image 2000: 0.7843, for the image 1987: 0.7923. The classification of the image 1987: accuracy 81.25%, 2000: 80,47%. The results indicate changes in land cover types affected by human activities, i.e. increased agricultural areas. Results include following findings. 1987: croplands (wheat) covered 71% of the today’s area (2000): 2382 vs. 3345 ha. Increase in barley cropland areas is noticeable as well: 1149 ha in 1987 vs. 4423 ha in 2000. Sparsely vegetated areas now also occupy more areas : 5914 ha in 2000 against 859 ha in 1987. Natural vegetation, decreased, which can be explained by the expansion of the agricultural lands. 1987: coppice areas covered 5500 ha while later on there are only 700 ha in this land type.
This preview presents a summary of four selected research on remote sensing drought assessment and impacts at both the regional and global levels as part of the course requirement for remote sensing for global environmental change. The papers are presented by Richard MacLean, graduate student in Geographic Information Systems for Development and Environment and Jenkins Macedo, graduate student in Environmental Science and Policy.
IMAGE PROCESSING AND CLUSTERING ALGORITHMS FOR FOREST COVER QUANTIFICATIONIAEME Publication
“Forest cover” refers to the relative land area covered by forests. Anthropological interventions and the subsequent diminishing forest cover, result in environmental degradation, impacting man-nature interactions. Hence, it became the need of the moment to monitor the forest cover to minimize natural perils and promote sustainable development. The present preliminary work focuses on implementing image processing and k- means clustering techniques on satellite imagery to monitor and quantify the forest cover of the Sundarbans delta, existing across India and Bangladesh. Imagebased algorithms relying on characteristic colouration were proposed for analysing the percentage of forest cover in the predefined area. Among various methods of monitoring and examining forest land, image-based algorithms can be of vital use due to the rise in the accessibility of information and the potential of analysing large data sets with the least processing time. The above-discussed techniques, along with the availability of Machine Learning (ML) and spaceborne photography, will have a futuristic impact on interpreting the variations in land cover and land utilization. Building upon the following algorithm, it is now conceivable to conduct timely comprehensive analysis, real-time evaluation, monitoring, and control on how events unfold. Similarly, data collected from various geographical observation systems may provide several other qualitative features that are more focused.
Measuring Individual Tree Height and Crown Diameter for Mangrove Trees with A...INFOGAIN PUBLICATION
Mangroves are unique ecosystems that provide valuable coastal area habitats, protection, and services. Access to observing mangrove forests is typically difficult on the ground. Therefore, it is of interest to develop and evaluate remote sensing methods that enable us to obtain accurate information on the structure of mangrove forests and to monitor their condition in time. The main objective of this study was to develop a methodology for processing airborne lidar data for measuring height and crown diameter for mangrove forests in the north-eastern coastal areas of Brazil. Specific objectives were to: (1) evaluate the most appropriate lidar data processing approach, such as area-based or individual tree methods, (2) investigate the most appropriate parameters for lidar-derived data products when estimating height and crown diameter, such as the spatial resolution of canopy height models and ground elevation models; and (3) compare the accuracy of lidar estimates to field measurements of height and crown diameter. The lidar dataset was acquired over mangrove forest of the northeast of Brazil. The crown diameter was calculated as the average of two values measured along two perpendicular directions from the location of each tree top by fitting a fourth-degree polynomial on both profiles. The lidar-derived tree measurements were used with regression models and cross-validation to estimate plot level field-measured crown diameter. Root mean square error, linear regression and the Nash-Sutcliffe coefficient were also used to compare lidar height and field height. The mean of lidar-estimated tree height was 9,48m and the mean of field tree height was 8.44m. The correlation between lidar tree height and field tree height was r= 0.60, E=-0.06 and RMSE= 2.8. The correlation between height and crown diameter needed to parameterized the individual tree identification software obtained for 32 trees was r= 0.83 and determination coefficient was r2 = 0.69. The results of the current study show that lidar data could be used to estimate height and average crown diameter of mangrove trees and to improve estimates of other mangrove forest biophysical parameters of interest by focusing at the individual tree level. The research presented in this study contributes to the overall knowledge of using lidar remote sensing to measure and monitor mangrove forests.
Measuring Individual Tree Height and Crown Diameter for Mangrove Trees with A...INFOGAIN PUBLICATION
Mangroves are unique ecosystems that provide valuable coastal area habitats, protection, and services. Access to observing mangrove forests is typically difficult on the ground. Therefore, it is of interest to develop and evaluate remote sensing methods that enable us to obtain accurate information on the structure of mangrove forests and to monitor their condition in time. The main objective of this study was to develop a methodology for processing airborne lidar data for measuring height and crown diameter for mangrove forests in the north-eastern coastal areas of Brazil. Specific objectives were to: (1) evaluate the most appropriate lidar data processing approach, such as area-based or individual tree methods, (2) investigate the most appropriate parameters for lidar-derived data products when estimating height and crown diameter, such as the spatial resolution of canopy height models and ground elevation models; and (3) compare the accuracy of lidar estimates to field measurements of height and crown diameter. The lidar dataset was acquired over mangrove forest of the northeast of Brazil. The crown diameter was calculated as the average of two values measured along two perpendicular directions from the location of each tree top by fitting a fourth-degree polynomial on both profiles. The lidar-derived tree measurements were used with regression models and cross-validation to estimate plot level field-measured crown diameter. Root mean square error, linear regression and the Nash-Sutcliffe coefficient were also used to compare lidar height and field height. The mean of lidar-estimated tree height was 9,48m and the mean of field tree height was 8.44m. The correlation between lidar tree height and field tree height was r= 0.60, E=-0.06 and RMSE= 2.8. The correlation between height and crown diameter needed to parameterized the individual tree identification software obtained for 32 trees was r= 0.83 and determination coefficient was r2 = 0.69. The results of the current study show that lidar data could be used to estimate height and average crown diameter of mangrove trees and to improve estimates of other mangrove forest biophysical parameters of interest by focusing at the individual tree level. The research presented in this study contributes to the overall knowledge of using lidar remote sensing to measure and monitor mangrove forests.
Assessing the performance of random forest regression for estimating canopy h...IJECEIAES
Accurate estimation of forest canopy height is essential for monitoring forest ecosystems and assessing their carbon storage potential. This study evaluates the effectiveness of different remote sensing techniques for estimating forest canopy height in tropical dry forests. Using field data and remote sensing data from airborne lidar and polarimetric synthetic aperture radar (SAR), a random forest (RF) model was developed to estimate canopy height based on different indices. Results show that the normalize difference build-up index (NDBI) has the highest correlation with canopy height, outperforming other indices such as relative vigor index (RVI) and polarimetric vertical and horizontal variables. The RF model with NDBI as input showed a good fit and predictive ability, with low concentration of errors around 0. These findings suggest that NDBI can be a useful tool for accurately estimating forest canopy height in tropical dry forests using remote sensing techniques, providing valuable information for forest management and conservation efforts.
To meet the various information requirements in forest management, different data sources like field survey, aerial photography, and satellite imagery is used, depending on the level of detail required and the extension of the area under study.
Myanmar is one of the most forested countries in mainland South-east Asia. These forests support a large number of important species and endemics and have great value for global efforts in biodiversity conservation.
study and analysis of hy si data in 400 to 500IJAEMSJORNAL
The ability to extract information about world and present it in way that our visual perception can comprehend is ultimate goal of imaging science in remote sensing .Hyperspectral imaging system is most powerful tool in the field of remote sensing also called as imaging spectroscopy, It is new technique used by researcher to detect terrestrial, vegetation and mineral. This paper reports analysis of hyperspectral images. Firstly the hyperspectral image analyzed by using supervised classification of Amravati region from Maharashtra province of India. The report reveals spectral analysis of Amravati region. We acquired satellite imagery to perform the classification using maximum like hood classifier. Analysis is performing in ERDAS to determine the spectral reflectance against the no of band. The analytical outcome of paper is representing the soil, water, vegetation index of the region.
INTEGRATED TECHNOLOGY OF DATA REMOTE SENSING AND GIS TECHNIQUES ASSESS THE LA...acijjournal
The present study focuses on the nature and pattern of urban expansion of Madurai city over its
surrounding region during the period from 2003 to 2013. Based on Its proximity to the Madurai city,
Preparation of various thematic data such Land use and Land cover using Land sat data. Create a land
use land cover map from satellite imagery using supervised classification. Find out the areas from the
classified data. The study is Based on secondary data, the satellite imagery has downloaded from GLCF
(Global Land Cover Facility) web site, for the study area (path101 row 67), the downloaded imagery
Subset using Imagery software to clip the study area. The clipped satellite imagery has Send to prepare the
land use and land cover map using supervised classification.
Android mobile application for wildfire reporting and monitoringriyaniaes
Peat fires cause major environmental problems in Central Kalimantan Province, Indonesia and threaten human health and effect the social-economic sector. The lack of peat fire detection systems is one factor that causing these reoccurring fires. Therefore, in this study, we develop an Android mobile platform application and a web-based application to support the citizen-volunteers who want to contribute wildfires reports, and the decision-makers who wish to collect, visualize, and evaluate these wildfires reports. In this paper, the global navigation satellite system (GNSS) and a global position system (GPS) sensor from a smartphone’s camera, is a useful tool to show the potential fire and smoke’s close-range location. The exchangeable image (EXIF) file image and GPS metadata captured by a mobile phone can store and supply raw observation to our devices and sent it to the data center through global internet communication. This work’s results are the proposed application easy-to-use to monitoring potential peat fire by location and data activity. This paper focuses on developing an application for the mobile platform for peat fire reporting and a web-based application to collect peat fire location for decision-makers. Our main objective is to detect the potential and spread of fire in peatlands as early as possible by utilizing community reports using smartphones.
Mapping and Monitoring Spatial-Temporal Cover Change of Prosopis Species Colo...inventionjournals
ABSTRACT: This study integrates Gis and remote sensing to detect, quantify and monitor the rate at which Prosopis species colonization has been taking place since its introduction. Multi-date Landsat 30m resolution imageries covering a period of 25 years were classified into four classes i.e. Prosopis species dominated canopy, mixed woodland, grass land and bush land and finally bare land and agricultural fields. Change detection analysis was performed using 10% threshold to identify and quantify areas where change or No change has occurred. The results indicate that the area under bare land and agricultural fields decreased at a rate of 18.22% per year from 29% in 1985 to 3% in 1990. Between 2005 and 2010 it decreased from 9% in 2005 to 5% in 2010 at a rate of 8.94% per year. Prosopis species colonization has been increasing since 1985 where it was at 0% increasing to 51% in 1990 at a rate of 58.18% per year. Between 2005 and 2010 it decreased from 56% in 2005 to stand at 44% in 2010 at a rate of 4.34% per year. The study found out that there is no threat of desertification in the study area as a result of Prosopis species colonizing the landscape. More studies to be done to identify sustainable method of controlling Prosopis species colonization to avoid more loss of agricultural land and grazing fields.
Remote sensing and GIS application for monitoring drought vulnerability in In...riyaniaes
Agricultural drought is one of the hydrometeorological disasters that cause significant losses because it affects food stocks. In addition, agricultural droughts, impact the physical and socio-economic development of the community. Remote sensing technology is used to monitor agricultural droughts spatially and temporally for minimizing losses. This study reviewed the literatures related to remote sensing and GIS for monitoring drought vulnerability in Indonesia. The study was conducted on an island-scale on Java Island, a provincial-scale in East Java and Bali, and a district-scale in Indramayu and Kebumen. The dominant method was the drought index, which involves variable land surface temperature (LST), vegetation index, land cover, wetness index, and rainfall. Each study has a strong point and a weak point. Low-resolution satellite imagery has been used to assess drought vulnerability. At the island scale, it provides an overview of drought conditions, while at the provincial scale, it focuses on paddy fields and has little detailed information. In-situ measurements at the district scale detect meteorological drought accurately, but there were limitations in the mapping unit's detailed information. Drought mapping using GIS and remote sensing at the district scale has detailed spatial information on climate and physiographic aspects, but it needs temporal data monitoring.
Spatial analysis for the assessment of the environmental changes in the lands...Universität Salzburg
Presented research is focused on the spatial analysis aimed at the assessment of the environmental changes in the landscapes of Izmir surroundings, Turkey. Methods include Landsat TM images classification using Erdas Imagine, clustering segmentation and classification, verification via the Google Earth and GIS Mapping. Tme span is 13-years (1987-2000). Images were taken from the Global Land Cover Facility (GLCF) Earth Science Data Interface. The selected area of Izmir has the most diverse landscape structure and high heterogeneity of the land cover types. Accuracy results computed. Kappa statistics for the image 2000: 0.7843, for the image 1987: 0.7923. The classification of the image 1987: accuracy 81.25%, 2000: 80,47%. The results indicate changes in land cover types affected by human activities, i.e. increased agricultural areas. Results include following findings. 1987: croplands (wheat) covered 71% of the today’s area (2000): 2382 vs. 3345 ha. Increase in barley cropland areas is noticeable as well: 1149 ha in 1987 vs. 4423 ha in 2000. Sparsely vegetated areas now also occupy more areas : 5914 ha in 2000 against 859 ha in 1987. Natural vegetation, decreased, which can be explained by the expansion of the agricultural lands. 1987: coppice areas covered 5500 ha while later on there are only 700 ha in this land type.
This preview presents a summary of four selected research on remote sensing drought assessment and impacts at both the regional and global levels as part of the course requirement for remote sensing for global environmental change. The papers are presented by Richard MacLean, graduate student in Geographic Information Systems for Development and Environment and Jenkins Macedo, graduate student in Environmental Science and Policy.
IMAGE PROCESSING AND CLUSTERING ALGORITHMS FOR FOREST COVER QUANTIFICATIONIAEME Publication
“Forest cover” refers to the relative land area covered by forests. Anthropological interventions and the subsequent diminishing forest cover, result in environmental degradation, impacting man-nature interactions. Hence, it became the need of the moment to monitor the forest cover to minimize natural perils and promote sustainable development. The present preliminary work focuses on implementing image processing and k- means clustering techniques on satellite imagery to monitor and quantify the forest cover of the Sundarbans delta, existing across India and Bangladesh. Imagebased algorithms relying on characteristic colouration were proposed for analysing the percentage of forest cover in the predefined area. Among various methods of monitoring and examining forest land, image-based algorithms can be of vital use due to the rise in the accessibility of information and the potential of analysing large data sets with the least processing time. The above-discussed techniques, along with the availability of Machine Learning (ML) and spaceborne photography, will have a futuristic impact on interpreting the variations in land cover and land utilization. Building upon the following algorithm, it is now conceivable to conduct timely comprehensive analysis, real-time evaluation, monitoring, and control on how events unfold. Similarly, data collected from various geographical observation systems may provide several other qualitative features that are more focused.
Measuring Individual Tree Height and Crown Diameter for Mangrove Trees with A...INFOGAIN PUBLICATION
Mangroves are unique ecosystems that provide valuable coastal area habitats, protection, and services. Access to observing mangrove forests is typically difficult on the ground. Therefore, it is of interest to develop and evaluate remote sensing methods that enable us to obtain accurate information on the structure of mangrove forests and to monitor their condition in time. The main objective of this study was to develop a methodology for processing airborne lidar data for measuring height and crown diameter for mangrove forests in the north-eastern coastal areas of Brazil. Specific objectives were to: (1) evaluate the most appropriate lidar data processing approach, such as area-based or individual tree methods, (2) investigate the most appropriate parameters for lidar-derived data products when estimating height and crown diameter, such as the spatial resolution of canopy height models and ground elevation models; and (3) compare the accuracy of lidar estimates to field measurements of height and crown diameter. The lidar dataset was acquired over mangrove forest of the northeast of Brazil. The crown diameter was calculated as the average of two values measured along two perpendicular directions from the location of each tree top by fitting a fourth-degree polynomial on both profiles. The lidar-derived tree measurements were used with regression models and cross-validation to estimate plot level field-measured crown diameter. Root mean square error, linear regression and the Nash-Sutcliffe coefficient were also used to compare lidar height and field height. The mean of lidar-estimated tree height was 9,48m and the mean of field tree height was 8.44m. The correlation between lidar tree height and field tree height was r= 0.60, E=-0.06 and RMSE= 2.8. The correlation between height and crown diameter needed to parameterized the individual tree identification software obtained for 32 trees was r= 0.83 and determination coefficient was r2 = 0.69. The results of the current study show that lidar data could be used to estimate height and average crown diameter of mangrove trees and to improve estimates of other mangrove forest biophysical parameters of interest by focusing at the individual tree level. The research presented in this study contributes to the overall knowledge of using lidar remote sensing to measure and monitor mangrove forests.
Measuring Individual Tree Height and Crown Diameter for Mangrove Trees with A...INFOGAIN PUBLICATION
Mangroves are unique ecosystems that provide valuable coastal area habitats, protection, and services. Access to observing mangrove forests is typically difficult on the ground. Therefore, it is of interest to develop and evaluate remote sensing methods that enable us to obtain accurate information on the structure of mangrove forests and to monitor their condition in time. The main objective of this study was to develop a methodology for processing airborne lidar data for measuring height and crown diameter for mangrove forests in the north-eastern coastal areas of Brazil. Specific objectives were to: (1) evaluate the most appropriate lidar data processing approach, such as area-based or individual tree methods, (2) investigate the most appropriate parameters for lidar-derived data products when estimating height and crown diameter, such as the spatial resolution of canopy height models and ground elevation models; and (3) compare the accuracy of lidar estimates to field measurements of height and crown diameter. The lidar dataset was acquired over mangrove forest of the northeast of Brazil. The crown diameter was calculated as the average of two values measured along two perpendicular directions from the location of each tree top by fitting a fourth-degree polynomial on both profiles. The lidar-derived tree measurements were used with regression models and cross-validation to estimate plot level field-measured crown diameter. Root mean square error, linear regression and the Nash-Sutcliffe coefficient were also used to compare lidar height and field height. The mean of lidar-estimated tree height was 9,48m and the mean of field tree height was 8.44m. The correlation between lidar tree height and field tree height was r= 0.60, E=-0.06 and RMSE= 2.8. The correlation between height and crown diameter needed to parameterized the individual tree identification software obtained for 32 trees was r= 0.83 and determination coefficient was r2 = 0.69. The results of the current study show that lidar data could be used to estimate height and average crown diameter of mangrove trees and to improve estimates of other mangrove forest biophysical parameters of interest by focusing at the individual tree level. The research presented in this study contributes to the overall knowledge of using lidar remote sensing to measure and monitor mangrove forests.
Assessing the performance of random forest regression for estimating canopy h...IJECEIAES
Accurate estimation of forest canopy height is essential for monitoring forest ecosystems and assessing their carbon storage potential. This study evaluates the effectiveness of different remote sensing techniques for estimating forest canopy height in tropical dry forests. Using field data and remote sensing data from airborne lidar and polarimetric synthetic aperture radar (SAR), a random forest (RF) model was developed to estimate canopy height based on different indices. Results show that the normalize difference build-up index (NDBI) has the highest correlation with canopy height, outperforming other indices such as relative vigor index (RVI) and polarimetric vertical and horizontal variables. The RF model with NDBI as input showed a good fit and predictive ability, with low concentration of errors around 0. These findings suggest that NDBI can be a useful tool for accurately estimating forest canopy height in tropical dry forests using remote sensing techniques, providing valuable information for forest management and conservation efforts.
Carbon Stocks Estimation in South East Sulawesi Tropical Forest, Indonesia, u...ijceronline
This paper was aimed to estimate carbon stocks in South East Sulawesi tropical forest, Indonesia, using Polarimetric Interferometry Synthetic Aperture Radar (PolInSAR). Two coherence Synthetic Aperture Radar (SAR) images of ALOS PALSAR full-polarimetric were used in this research. The research method is forming Random Volume over Ground (RVoG) model from interferometric phase coherence of two Full-Polarimetric ALOS PALSAR which temporal baseline is 46 days. Due to temporal decorrelation, coherence optimization was conducted to produce image with optimum coherences. The result showed that the RVoG forest height and carbon stocks which obtained from height inversion has a positive correlation with ground measurement.
Comparing of Land Change Modeler and Geomod Modeling for the Assessment of De...IJAEMSJORNAL
The forest destruction, climate change and global warming can reduce an indirect forest benefit because forest is the largest carbon sink and it plays a very important role in global carbon cycle. To support reducing emissions from deforestation and forest degradation (REDD+) program, there is a need to understand the characteristics of existing Land Use/Cover Change (LUCC) modules. The aims of this study are 1) to calculate the rate of deforestation at Poso Regency; and 2) to compare the performance of LCM and GM for simulating baseline deforestation of multiple transitions based on model structure and predictive accuracy. The data used in this study are : 1) Indonesia tophographic map scale 1; 50.000, produced by Geospatial Information Agency (BIG), 2) Landcover maps (1990, 2000, and 2011) which were collected from the Director General of Forestry Planning, Ministry of Environment and Forestry. Meanwhile independent variables (environmental variables) such as : distance from the edge of the forest, the distance from roads, the distance from streams, the distance from settlement, elevation and slope. Landcover changes analysis was assessed by using Idrisi Terrset software and Geomod software. Landcover maps from 1990 and 2000 were used to simulate land-cover of 2011. The resulting maps were compared with an observed land-cover map of 2011. The predictive accuracy of multiple transition modeling was calculated by using Relative Operating Characteristics (ROC). The results show that the deforestation on the period of 1990-2011 reached 19,944 ha (3.55 %) or the rate of deforestation 949 ha year1. Based on the model structure and predictive accuracy comparisons, the LCM was more suitable than the GM for the asssement of deforestation.
Supervised classification and improved filtering method for shoreline detection.Dr Amira Bibo
ABSTRACT
Shoreline monitoring is important to overcome the problems in the measurement of the shoreline. Recently,
many researchers have directed attention to methods of predicting shoreline changes by the use of
multispectral images. However, the images being captured tend to have several problems due to the weather.
Therefore, identification of multi class features which includes vegetation and shoreline using multispectral
satellite image is one of the challenges encountered in the detection of shoreline. An efficient framework
using the near infrared–histogram equalisation and improved filtering method is proposed to enhance the
detection of the shoreline in Tanjung Piai, Malaysia, by using SPOT-5 images. Sub-pixel edge detection andthe Wallis filter are used to compute the edge location with the subpixel accuracy and reduce the noise. Then,the image undergoes image classification process by using Support Vector Machine. The proposed method performed more effectively and reliable in preserving the missing line of the shoreline edge in the SPOT-5
images.
Application of Remote Sensing Techniques for Change Detection in Land Use/ La...iosrjce
IOSR Journal of Applied Geology and Geophysics (IOSR-JAGG) is a double blind peer reviewed International Journal that provides rapid publication (within a month) of articles in all areas of Applied Geology and Geophysics. The journal welcomes publications of high quality papers on theoretical developments and practical applications in Applied Geology and Geophysics. Original research papers, state-of-the-art reviews, and high quality technical notes are invited for publications.
Mangrove Vegetation Mapping Using Sentinel-2A Imagery Based on Google Earth E...Luhur Moekti Prayogo
Mangroves are trees whose habitat is affected by tides, and their presence has decreased from year to year. Today, mapping technology has undergone many developments, including the availability of images of various resolutions and cloud-based image processing. One of the popular platforms today is the Google Earth Engine. Google Earth Engine is a cloud-based platform that makes it easy to access high-performance computing resources for extensive processing. The advantage of using Google Earth Engine is that users do not have to be IT experts without experts in application development, WEB programming, and HTML. This study aims to conduct a study on mangrove mapping in Gili Genting District with Sentinel-2A imagery using a Google Earth Engine. This location was chosen since there are still many mangroves, especially on the Gili Raja and Gili Genting Islands. From this research, it can be concluded that cloud computing-based Sentinel-2A image processing shows that the vegetation value of NDVI results ranges from -0.923208 to 0.75579. The classification results show that mangrove forests' overall presence on Gili Genting Island is more expansive than Gili Raja Island with 16.74 ha and 14.75 ha. The use of the Google Earth Engine platform simplifies the analysis process because image processing can be done once with various scripts so that analysis becomes faster.
Optimization of Parallel K-means for Java Paddy Mapping Using Time-series Sat...TELKOMNIKA JOURNAL
Spatiotemporal analysis of MODIS Vegetation Index Imagery widely used for vegetation
seasonal mapping both on forest and agricultural site. In order to provide a long -terms of vegetation
characteristic maps, a wide time-series images analysis is needed which require high-performance
computer and also consumes a lot of energy resources. Meanwhile, for agriculture monitoring purpose in
Indonesia, that analysis has to be employed gradually and endlessly to provide the latest condition of
paddy field vegetation information. This research is aimed to develop a method to produce the optimized
solution in classifying vegetation of paddy fields that diverse both spatial and temporal characteristics. The
time-series EVI data from MODIS have been filtered using wavelet transform to reduce noise that caused
by cloud. Sequential K-means and Parallel K-means unsupervised classification method were used in both
CPU and GPU to find the efficient and the robust result. The developed method has been tested and
implemented using the sample case of paddy fields in Java Island. The best system which can
accommodate of the extend-ability, affordability, redundancy, energy-saving, maintainability indicators are
ARM-based processor (Raspberry Pi), with the highest speed up of 8 and the efficiency of 60%.
Comparing canopy density measurement from UAV and hemispherical photography: ...IJECEIAES
UAV and hemispherical photography are common methods used in canopy density measurement. These two methods have opposite viewing angles where hemispherical photography measures canopy density upwardly, while UAV captures images downwardly. This study aims to analyze and compare both methods to be used as the input data for canopy density estimation when linked with a lower spatial resolution of remote sensing data i.e. Landsat image. We correlated the field data of canopy density with vegetation indices (NDVI, MSAVI, and AFRI) from Landsat-8. The canopy density values measured from UAV and hemispherical photography displayed a strong relationship with 0.706 coefficient of correlation. Further results showed that both measurements can be used in canopy density estimation using satellite imagery based on their high correlations with Landsat-based vegetation indices. The highest correlation from downward and upward measurement appeared when linked with NDVI with a correlation of 0.962 and 0.652, respectively. Downward measurement using UAV exhibited a higher relationship compared to hemispherical photography. The strong correlation between UAV data and Landsat data is because both are captured from the vertical direction, and 30 m pixel of Landsat is a downscaled image of the aerial photograph. Moreover, field data collection can be easily conducted by deploying drone to cover inaccessible sample plots.
Land use/land cover classification using machine learning modelsIJECEIAES
An ensemble model has been proposed in this work by combining the extreme gradient boosting classification (XGBoost) model with support vector machine (SVM) for land use and land cover classification (LULCC). We have used the multispectral Landsat-8 operational land imager sensor (OLI) data with six spectral bands in the electromagnetic spectrum (EM). The area of study is the administrative boundary of the twin cities of Odisha. Data collected in 2020 is classified into seven land use classes/labels: river, canal, pond, forest, urban, agricultural land, and sand. Comparative assessments of the results of ten machine learning models are accomplished by computing the overall accuracy, kappa coefficient, producer accuracy and user accuracy. An ensemble classifier model makes the classification more precise than the other state-of-the-art machine learning classifiers.
The present study focuses on the nature and pattern of urban expansion of Madurai city over its surrounding region during the period from 2003 to 2008. Based on its proximity to the Madurai city, Preparation of various thematic data such Land use and Land cover using Land sat data. Create a land use land cover map from satellite imagery using supervised classification. Find out the areas from the classified data. The study is based on secondary data, the satellite imagery has downloaded from GLCF (Global Land Cover Facility) web site, for the study area (path101 row 67), the downloaded imagery subset using Imagery software to clip the study area. The clipped satellite imagery has used to prepare the land use and land cover map using supervised classification.
Square transposition: an approach to the transposition process in block cipherjournalBEEI
The transposition process is needed in cryptography to create a diffusion effect on data encryption standard (DES) and advanced encryption standard (AES) algorithms as standard information security algorithms by the National Institute of Standards and Technology. The problem with DES and AES algorithms is that their transposition index values form patterns and do not form random values. This condition will certainly make it easier for a cryptanalyst to look for a relationship between ciphertexts because some processes are predictable. This research designs a transposition algorithm called square transposition. Each process uses square 8 × 8 as a place to insert and retrieve 64-bits. The determination of the pairing of the input scheme and the retrieval scheme that have unequal flow is an important factor in producing a good transposition. The square transposition can generate random and non-pattern indices so that transposition can be done better than DES and AES.
Hyper-parameter optimization of convolutional neural network based on particl...journalBEEI
Deep neural networks have accomplished enormous progress in tackling many problems. More specifically, convolutional neural network (CNN) is a category of deep networks that have been a dominant technique in computer vision tasks. Despite that these deep neural networks are highly effective; the ideal structure is still an issue that needs a lot of investigation. Deep Convolutional Neural Network model is usually designed manually by trials and repeated tests which enormously constrain its application. Many hyper-parameters of the CNN can affect the model performance. These parameters are depth of the network, numbers of convolutional layers, and numbers of kernels with their sizes. Therefore, it may be a huge challenge to design an appropriate CNN model that uses optimized hyper-parameters and reduces the reliance on manual involvement and domain expertise. In this paper, a design architecture method for CNNs is proposed by utilization of particle swarm optimization (PSO) algorithm to learn the optimal CNN hyper-parameters values. In the experiment, we used Modified National Institute of Standards and Technology (MNIST) database of handwritten digit recognition. The experiments showed that our proposed approach can find an architecture that is competitive to the state-of-the-art models with a testing error of 0.87%.
Supervised machine learning based liver disease prediction approach with LASS...journalBEEI
In this contemporary era, the uses of machine learning techniques are increasing rapidly in the field of medical science for detecting various diseases such as liver disease (LD). Around the globe, a large number of people die because of this deadly disease. By diagnosing the disease in a primary stage, early treatment can be helpful to cure the patient. In this research paper, a method is proposed to diagnose the LD using supervised machine learning classification algorithms, namely logistic regression, decision tree, random forest, AdaBoost, KNN, linear discriminant analysis, gradient boosting and support vector machine (SVM). We also deployed a least absolute shrinkage and selection operator (LASSO) feature selection technique on our taken dataset to suggest the most highly correlated attributes of LD. The predictions with 10 fold cross-validation (CV) made by the algorithms are tested in terms of accuracy, sensitivity, precision and f1-score values to forecast the disease. It is observed that the decision tree algorithm has the best performance score where accuracy, precision, sensitivity and f1-score values are 94.295%, 92%, 99% and 96% respectively with the inclusion of LASSO. Furthermore, a comparison with recent studies is shown to prove the significance of the proposed system.
A secure and energy saving protocol for wireless sensor networksjournalBEEI
The research domain for wireless sensor networks (WSN) has been extensively conducted due to innovative technologies and research directions that have come up addressing the usability of WSN under various schemes. This domain permits dependable tracking of a diversity of environments for both military and civil applications. The key management mechanism is a primary protocol for keeping the privacy and confidentiality of the data transmitted among different sensor nodes in WSNs. Since node's size is small; they are intrinsically limited by inadequate resources such as battery life-time and memory capacity. The proposed secure and energy saving protocol (SESP) for wireless sensor networks) has a significant impact on the overall network life-time and energy dissipation. To encrypt sent messsages, the SESP uses the public-key cryptography’s concept. It depends on sensor nodes' identities (IDs) to prevent the messages repeated; making security goals- authentication, confidentiality, integrity, availability, and freshness to be achieved. Finally, simulation results show that the proposed approach produced better energy consumption and network life-time compared to LEACH protocol; sensors are dead after 900 rounds in the proposed SESP protocol. While, in the low-energy adaptive clustering hierarchy (LEACH) scheme, the sensors are dead after 750 rounds.
Plant leaf identification system using convolutional neural networkjournalBEEI
This paper proposes a leaf identification system using convolutional neural network (CNN). This proposed system can identify five types of local Malaysia leaf which were acacia, papaya, cherry, mango and rambutan. By using CNN from deep learning, the network is trained from the database that acquired from leaf images captured by mobile phone for image classification. ResNet-50 was the architecture has been used for neural networks image classification and training the network for leaf identification. The recognition of photographs leaves requested several numbers of steps, starting with image pre-processing, feature extraction, plant identification, matching and testing, and finally extracting the results achieved in MATLAB. Testing sets of the system consists of 3 types of images which were white background, and noise added and random background images. Finally, interfaces for the leaf identification system have developed as the end software product using MATLAB app designer. As a result, the accuracy achieved for each training sets on five leaf classes are recorded above 98%, thus recognition process was successfully implemented.
Customized moodle-based learning management system for socially disadvantaged...journalBEEI
This study aims to develop Moodle-based LMS with customized learning content and modified user interface to facilitate pedagogical processes during covid-19 pandemic and investigate how teachers of socially disadvantaged schools perceived usability and technology acceptance. Co-design process was conducted with two activities: 1) need assessment phase using an online survey and interview session with the teachers and 2) the development phase of the LMS. The system was evaluated by 30 teachers from socially disadvantaged schools for relevance to their distance learning activities. We employed computer software usability questionnaire (CSUQ) to measure perceived usability and the technology acceptance model (TAM) with insertion of 3 original variables (i.e., perceived usefulness, perceived ease of use, and intention to use) and 5 external variables (i.e., attitude toward the system, perceived interaction, self-efficacy, user interface design, and course design). The average CSUQ rating exceeded 5.0 of 7 point-scale, indicated that teachers agreed that the information quality, interaction quality, and user interface quality were clear and easy to understand. TAM results concluded that the LMS design was judged to be usable, interactive, and well-developed. Teachers reported an effective user interface that allows effective teaching operations and lead to the system adoption in immediate time.
Understanding the role of individual learner in adaptive and personalized e-l...journalBEEI
Dynamic learning environment has emerged as a powerful platform in a modern e-learning system. The learning situation that constantly changing has forced the learning platform to adapt and personalize its learning resources for students. Evidence suggested that adaptation and personalization of e-learning systems (APLS) can be achieved by utilizing learner modeling, domain modeling, and instructional modeling. In the literature of APLS, questions have been raised about the role of individual characteristics that are relevant for adaptation. With several options, a new problem has been raised where the attributes of students in APLS often overlap and are not related between studies. Therefore, this study proposed a list of learner model attributes in dynamic learning to support adaptation and personalization. The study was conducted by exploring concepts from the literature selected based on the best criteria. Then, we described the results of important concepts in student modeling and provided definitions and examples of data values that researchers have used. Besides, we also discussed the implementation of the selected learner model in providing adaptation in dynamic learning.
Prototype mobile contactless transaction system in traditional markets to sup...journalBEEI
One way to prevent and reduce the spread of the covid-19 pandemic is through physical distancing program. This research aims to develop a prototype contactless transaction system using digital payment mechanisms and QR code technology that will be applied in traditional markets. The method used in the development of electronic market systems is a prototype approach. The application of QR code and digital payments are used as a solution to minimize money exchange contacts that are common in traditional markets. The results showed that the system built was able to accelerate and facilitate the buying and selling transaction process in traditional market environment. Alpha testing shows that all functional systems are running well. Meanwhile, beta testing shows that the user can very well accept the system that was built. The results of the study also show acceptance of the usefulness of the system being built, as well as the optimism of its users to be able to take advantage of this system both technologically and functionally, so its can be a part of the digital transformation of the traditional market to the electronic market and has become one of the solutions in reducing the spread of the current covid-19 pandemic.
Wireless HART stack using multiprocessor technique with laxity algorithmjournalBEEI
The use of a real-time operating system is required for the demarcation of industrial wireless sensor network (IWSN) stacks (RTOS). In the industrial world, a vast number of sensors are utilised to gather various types of data. The data gathered by the sensors cannot be prioritised ahead of time. Because all of the information is equally essential. As a result, a protocol stack is employed to guarantee that data is acquired and processed fairly. In IWSN, the protocol stack is implemented using RTOS. The data collected from IWSN sensor nodes is processed using non-preemptive scheduling and the protocol stack, and then sent in parallel to the IWSN's central controller. The real-time operating system (RTOS) is a process that occurs between hardware and software. Packets must be sent at a certain time. It's possible that some packets may collide during transmission. We're going to undertake this project to get around this collision. As a prototype, this project is divided into two parts. The first uses RTOS and the LPC2148 as a master node, while the second serves as a standard data collection node to which sensors are attached. Any controller may be used in the second part, depending on the situation. Wireless HART allows two nodes to communicate with each other.
Implementation of double-layer loaded on octagon microstrip yagi antennajournalBEEI
A double-layer loaded on the octagon microstrip yagi antenna (OMYA) at 5.8 GHz industrial, scientific and medical (ISM) Band is investigated in this paper. The double-layer consist of two double positive (DPS) substrates. The OMYA is overlaid with a double-layer configuration were simulated, fabricated and measured. A good agreement was observed between the computed and measured results of the gain for this antenna. According to comparison results, it shows that 2.5 dB improvement of the OMYA gain can be obtained by applying the double-layer on the top of the OMYA. Meanwhile, the bandwidth of the measured OMYA with the double-layer is 14.6%. It indicates that the double-layer can be used to increase the OMYA performance in term of gain and bandwidth.
The calculation of the field of an antenna located near the human headjournalBEEI
In this work, a numerical calculation was carried out in one of the universal programs for automatic electro-dynamic design. The calculation is aimed at obtaining numerical values for specific absorbed power (SAR). It is the SAR value that can be used to determine the effect of the antenna of a wireless device on biological objects; the dipole parameters will be selected for GSM1800. Investigation of the influence of distance to a cell phone on radiation shows that absorbed in the head of a person the effect of electromagnetic radiation on the brain decreases by three times this is a very important result the SAR value has decreased by almost three times it is acceptable results.
Exact secure outage probability performance of uplinkdownlink multiple access...journalBEEI
In this paper, we study uplink-downlink non-orthogonal multiple access (NOMA) systems by considering the secure performance at the physical layer. In the considered system model, the base station acts a relay to allow two users at the left side communicate with two users at the right side. By considering imperfect channel state information (CSI), the secure performance need be studied since an eavesdropper wants to overhear signals processed at the downlink. To provide secure performance metric, we derive exact expressions of secrecy outage probability (SOP) and and evaluating the impacts of main parameters on SOP metric. The important finding is that we can achieve the higher secrecy performance at high signal to noise ratio (SNR). Moreover, the numerical results demonstrate that the SOP tends to a constant at high SNR. Finally, our results show that the power allocation factors, target rates are main factors affecting to the secrecy performance of considered uplink-downlink NOMA systems.
Design of a dual-band antenna for energy harvesting applicationjournalBEEI
This report presents an investigation on how to improve the current dual-band antenna to enhance the better result of the antenna parameters for energy harvesting application. Besides that, to develop a new design and validate the antenna frequencies that will operate at 2.4 GHz and 5.4 GHz. At 5.4 GHz, more data can be transmitted compare to 2.4 GHz. However, 2.4 GHz has long distance of radiation, so it can be used when far away from the antenna module compare to 5 GHz that has short distance in radiation. The development of this project includes the scope of designing and testing of antenna using computer simulation technology (CST) 2018 software and vector network analyzer (VNA) equipment. In the process of designing, fundamental parameters of antenna are being measured and validated, in purpose to identify the better antenna performance.
Transforming data-centric eXtensible markup language into relational database...journalBEEI
eXtensible markup language (XML) appeared internationally as the format for data representation over the web. Yet, most organizations are still utilising relational databases as their database solutions. As such, it is crucial to provide seamless integration via effective transformation between these database infrastructures. In this paper, we propose XML-REG to bridge these two technologies based on node-based and path-based approaches. The node-based approach is good to annotate each positional node uniquely, while the path-based approach provides summarised path information to join the nodes. On top of that, a new range labelling is also proposed to annotate nodes uniquely by ensuring the structural relationships are maintained between nodes. If a new node is to be added to the document, re-labelling is not required as the new label will be assigned to the node via the new proposed labelling scheme. Experimental evaluations indicated that the performance of XML-REG exceeded XMap, XRecursive, XAncestor and Mini-XML concerning storing time, query retrieval time and scalability. This research produces a core framework for XML to relational databases (RDB) mapping, which could be adopted in various industries.
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The universal mobile telecommunications system (UMTS) has distinct benefits in that it supports a wide range of quality of service (QoS) criteria that users require in order to fulfill their requirements. The transmission of video and audio in real-time applications places a high demand on the cellular network, therefore QoS is a major problem in these applications. The ability to provide QoS in the UMTS backbone network necessitates an active QoS mechanism in order to maintain the necessary level of convenience on UMTS networks. For UMTS networks, investigation models for end-to-end QoS, total transmitted and received data, packet loss, and throughput providing techniques are run and assessed and the simulation results are examined. According to the results, appropriate QoS adaption allows for specific voice and video transmission. Finally, by analyzing existing QoS parameters, the QoS performance of 4G/UMTS networks may be improved.
Final project report on grocery store management system..pdfKamal Acharya
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and CIFAR-100) and ImageNet Large Scale Visual Recognition Challenge (ILSVRC12) datasets, showcasing
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Cosmetic shop management system project report.pdfKamal Acharya
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Assessing mangrove deforestation using pixel-based image: a machine learning approach
1. Bulletin of Electrical Engineering and Informatics
Vol. 10, No. 6, December 2021, pp. 3178~3190
ISSN: 2302-9285, DOI: 10.11591/eei.v10i6.3199 3178
Journal homepage: http://beei.org
Assessing mangrove deforestation using pixel-based image: a
machine learning approach
Ahmad Yahya Dawod1
, Mohammed Ali Sharafuddin2
1
International College of Digital Innovation, Chiang Mai University, Thailand
2
College of Maritime Studies and Management, Chiang Mai University, Thailand
Article Info ABSTRACT
Article history:
Received Aug 3, 2021
Revised Oct 3, 2021
Accepted Nov 1, 2021
Mangrove is one of the most productive global forest ecosystems and unique
in linking terrestrial and marine environment. This study aims to clarify and
understand artificial intelligence (AI) adoption in remote sensing mangrove
forests. The performance of machine learning algorithms such as random
forest (RF), support vector machine (SVM), decision tree (DT), and object-
based nearest neighbors (NN) algorithms were used in this study to
automatically classify mangrove forests using orthophotography and applying
an object-based approach to examine three features (tree cover loss, above-
ground carbon dioxide (CO2) emissions, and above-ground biomass loss).
SVM with a radial basis function was used to classify the remainder of the
images, resulting in an overall accuracy of 96.83%. Precision and recall
reached 93.33 and 96%, respectively. RF performed better than other
algorithms where there is no orthophotography.
Keywords:
Mangrove forests
Multiclass classifier
Object-based image
classification
Random forest
Support vector machine
Time series
This is an open access article under the CC BY-SA license.
Corresponding Author:
Mohammed Ali Sharafuddin
College of Maritime Studies and Management
Chiang Mai University
Samut Sakhon, 74000 Thailand
Email: mohammedali.s@cmu.ac.th
1. INTRODUCTION
Mangroves offer numerous benefits such as carbon sequestration, soil erosion prevention, and rich
biodiversity. Thus monitoring deforestation and managing mangrove forest sustainability are of crucial
concern, and satellite remote sensing is used to map and assess the changes over time [1]. However, the
traditional remote sensing approaches lack accuracy due to the coarse spatial resolution of the satellite image,
resulting in spectral species being confused with vegetation in landward areas [2]. A previous study [3]
reported 75 to 90% accuracy in detecting mangrove species, although the research only considered primary
forest areas overlapping mangrove tree cover. Light detection and ranging (LiDAR) and optical remote
sensing combined with the SVM algorithm to map and create a mangrove inventory was already adopted and
tested [4]. However, to the best of author’s knowledge, the applicability of LiDAR and optical images,
together with RF, is not tested for mapping mangrove forests. Furthermore, no comparison between random
forest (RF) and support vector machine (SVM) in mangrove mapping has yet been performed [5]. Changes in
mangroves forests have been previously studied using freely available time-series data of satellite-based
imagery [6]. Such remotely sensed time series data have proven to be effective for monitoring mangrove
ecosystem changes, using both aerial photographs (APs) as well as optical and synthetic-aperture radar
(SAR) data [7]. Thus, numerous studies have recently applied time series data to map mangrove changes. In
those, APs and visual interpretation are the most commonly applied techniques for detecting changes in
mangrove forests [8], [9]. This study similar to Turubanova et al. [10] defines primary forests as tropical
2. Bulletin of Electr Eng & Inf ISSN: 2302-9285
Assessing mangrove deforestation using pixel-based image: a machine learning … (Ahmad Yahya Dawod)
3179
woodland cover that has not remained totally cleared and regrown in later history. Landsat images was
classified into primary forest data, using a separate algorithm for each region and defined tree cover as all
vegetation higher than three meters as of 2000 [10]. To date, to the best of the author’s knowledge, there is
no published research available on the investigation of mangrove of all the 18 provinces within the Gulf of
Thailand. Hence, this research provides the first record of 21st
century mangrove history for seven different
provinces along with the mangrove changes around the Gulf of Thailand from 2001-2020. The growth and
distribution of the mangrove species for the year 2020 is predicted using datasets from 2001-2019, consisting
of the sea level rises, climate scenarios, and the influence of terrain change.
2. RELATED WORK
Recently, in Thailand, Palaeoecological analysis was conducted to assess mangrove species
evolution and changes over a period of one thousand five hundred years [11]. The study area covered the
Salak Phet Bay of Koh Chang Island in the Eastern Gulf of Thailand. The study findings revealed that
mangroves have survived throughout the past 1500 years, but the growing sea level raise challenges their
existence. Hence, satellite-based time series analysis could help to quantify and assess the extent of
mangrove forest evolution, as well as the decreasing or increasing trends over time. This data could be
utilized as a marker for structural features changes of the forests [12]. Therefore, sensing the satellite-based
spatio-temporal failures and success dynamics of naturally disturbed forests or rehabilitation projects and
their recovery, along with field surveys, are essential for assessing and maintaining the long-term
sustainability of mangrove forests. In addition, earth observation data can assist to fill the data gaps arising
from the using only the field data [13]. Hence, using Landsat time series data to analyze and monitor the
forest changes is reliable [14]. However, the authors noted several challenges to expanding the same
approach in a global context. A precise study on mangrove forests in Thailand, classifying them into two: the
mature and naturally present mangroves in the western coast of Thailand, and the younger rehabilitated
mangroves in the Gulf of Thailand [15]. The study reported serious mangrove deterioration throughout the
last century and mentioned various reasons for it, such as land encroachment, aquaculture, and pollution. On
the positive side, several community-driven [16] restoration projects have helped to restore the mangrove
forests in the Gulf of Thailand. However, no studies have been conducted on structural development, species
variety, and tree density in adjacent natural and young reforested or rehabilitated mangrove. Hence, the seven
provinces in the Gulf of Thailand undergoing mangrove restoration are included in this study.
3. OBJECTIVES
The first objective of this study is to examine time series data of seven provinces in the Gulf of
Thailand using statistical measurement approaches and selected modern and robust machine learning
algorithms to classify mangrove species using high spatial resolution imagery. The second objective is to
compare the performance and accuracy of four machine-learning algorithms, namely SVM, RF, decision tree
(DT), and object-based NN algorithms to classify mangroves using datasets from the global land analysis and
discovery laboratory of the University of Maryland, Google, USGS, and NASA, and by applying an object-
based approach. Finally, this study aims to provide three alternative features: tree cover loss, aboveground
CO2 emissions, and aboveground biomass loss for the years 2001-2019 with positive values.
4. DATA AND METHODS
4.1. Study area
Mangrove forests survive in intertidal zones, so they tend to be immersed in periodic seawater. They
also grow close and thick over time, making access difficult for extensive field surveys, and sampling.
Consequently, remote detected data are widely utilized in mangrove mapping, ranging from mid-high-
resolution satellite imagery to high-resolution drone based imagery. The classification of mangroves from
remote sensing can involve general image analysis and object-based image classification using pixels.
The representation used to characterize the results of the machine learning is a hypothesis for four machine-
learning methods. Thus, SVM, RF, DT, and NN were selected to train the dataset. The hypotheses are
described in the forms of specific relation between four statistical methods to involve the raw data by using
three features such as tree cover loss, aboveground CO2 emissions, and aboveground biomass loss.
Thailand is a Southeast Asian country with 77 provinces. The Gulf of Thailand covers roughly
320,000 km2
and is the busiest marine region in the country [17], [18]. Although 17 provinces within the Gulf
of Thailand have reported increased forest loss, this study focuses only on seven provinces namely: Samut
Sakhon, Samut Songkram, Surat Thani, Chon Buri, Rayong, and Nakhon Si Thammarat Figure 1.
3. ISSN: 2302-9285
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Figure 1. Seven Provinces included in the study and their time-series plot of tree cover loss, above ground
CO2 loss and above ground bio-mass loss data source: [17]; map source: GADM
4.2. Dataset selection
The dataset (2001-2020) used in this study was obtained from a collaboration project between the
GLAD laboratory at the University of Maryland, Google, USGS, and NASA [19], Tree cover regions
measure decrease in resolution of around 30 × 30 m2
. Data were obtained from the Landsat 5 Maper (TM),
the Landsat 7 map plus (ETM+), and the Landsat 8 operating landscaper (OLI) sensors utilizing multi-
spectral satellite imaging. More than one million satellite images, including around 600,000 Landsat 7 for
2000-2012, and over 400,000 Landsat 5, 7, and 8 images for the period 2011-2019 were processed and
analyzed, providing updates to the satellite. There is obvious land area monitoring and a supervised learning
method in satellite images. Song et al. [20] the pixel tree cover loss has been utilized to identify. The tree
cover is described in this data set as any vegetation greater than 5 m in height that may be planted through a
range of canopy densities in the shape of nature's forests. Tree cover loss is described as a booth replacement
disturbance or the entire tree cover evacuation canopy within the pixel range of Landsat. Tree cover loss may
be due to human actions including forest collection or deforestation (natural forest transformation into
various land uses) and also natural conditions like storm damage or illness. Tree cover losses may also be the
result of human activity. Therefore, deforestation is not comparable to loss.
4.3. Normalization
4.3.1. Normalize data
Normalization is a preprocessing step in the scaling method and used to find new information from
the existing array, and can aid the prediction process. There are several approaches for predicting data. To
maintain a large variation in prediction and forecasting, the normalization method is required to make them
closer [21]. Standard deviation can still be used with normalised data because both translation and linear
scaling have no effect on it. The classification stage entails determining the correlation values for each pair of
graphs and applying several rule-based techniques to categorize the characteristics of mangrove forests into
various categories [22]. The proposed normalization method is given as shown in with an explanation.
𝐵 =
(|𝐴|)−(10𝑛−1)×(|𝑥|)
10𝑛−1 (1)
Where 𝐴 is the particular data component, 𝑛is the number of digits in component 𝐴, 𝑥 is the first digit of a
data component, 𝐵is the scaled value between 0 and 1.
4. Bulletin of Electr Eng & Inf ISSN: 2302-9285
Assessing mangrove deforestation using pixel-based image: a machine learning … (Ahmad Yahya Dawod)
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4.3.2. Mangrove forest normalization
The Landsat images were normalized utilizing image normalization to decrease spectral variations
between Landsat, as described as shown in. This approach of the mangrove forest pixels applies the average
values for linear correction to each spectral band [7]. The variation in mean sea level over the 20 years of
monitoring showed negative correlation with normalized soil pore water salinity, such that years of high
salinity with low mean sea level are related with [23], indicative of lower levels of tidal inundation in several
regions in the Gulf of Thailand, thus impeding mangrove growth as.
𝜑𝑎𝑑𝑗(𝜆) = 𝜑𝑜𝑟𝑖(𝜆) − (𝑀𝑚𝑎𝑛(𝜆) + 𝑀𝑟𝑒𝑓(𝜆)) (2)
Where 𝜑𝑎𝑑𝑗(𝜆) is the normalized median for the band 𝜆, 𝑀𝑚𝑎𝑛(𝜆) is the median value of the dense mangrove
forest of the sample size for band 𝜆 , and 𝑀𝑟𝑒𝑓(𝜆) is the reference dense mangrove forest value for band 𝜆 as
computed for the well-known, stable locations identified using the Landsat images across the study area.
4.4. Machine learning algorithms
Machine learning (ML) discipline is closely connected to the database discipline [6] therefore
machine learning involves the integration of additional questions about the computational architectures and
algorithms which can be most effectively used to pull-in, index, merge, recover, and store these data; how
different learning subtasks can be arranged in a bigger system, and respond to the questions of computational
tractability. Thus, the model is considered as an approximation of the process that machines are required to
mimic. In such a situation, some input errors may be obtained, but mostly, the model provides correct
answers. Hence, another measure of performance (besides that involving the memory usage and speed
metrics) of a machine learning algorithm is the accuracy of results. In this study, four machine-learning
algorithms are chosen, consisting of SVM, RF, DT, and the object based NN algorithm.
4.4.1. Support vector machine
Machine learning is defined as the science of getting computers to learn the thoughts and actions of
humans to improve the performance of computers in analyzing data and information from the human
command [24]. One of the machine learning algorithms that may be utilized in the Google Earth Engine is
the SVM. The SVM, being a supervised non-parametric statistical learning method, may be used for both
classification and regression, making it appropriate for categorizing mangrove and non-mangrove forests
based on pixel reflectance [25]. The SVM is responsible for finding the decision boundary from several
different classes and maximizing the margin. An illustration of this could be found in the research conducted
by Heumann [1] which classifies mangrove cover using the SVM algorithm on the results of segmentation.
The SVM is employed in the training process by entering the training data into the vector space. The nearest
pattern from the training data is called a support vector. Only one previous study has applied the SVM [26] in
the analysis of mangroves as part of a combination methodology to map mangroves using spectral and image
texture data, while the performance of SVM for the multispectral classification of mangroves stays untested.
The mathematical equation can be annotated as.
𝑓(𝑥) = 𝑤𝑡
𝑥 + 𝑎 (3)
Considering the linear classifier for a binary classification problem with labels 𝑦 and features𝑥, 𝑦 ∈ {−1,1} is
used to denote the class labels and parameters 𝑤, 𝑎 as𝑤: normal to the line,𝑎: bias.
4.4.2. Random forest
The segmented training samples from the dataset were exported as comma-separated values (CSV)
with all seven classes input into the random forest classification and implemented in Weka 3.9 [27].
Preprocessing was performed on the training and testing sets (remaining non-ground objects) using CSV
which is the file structure utilized by Weka. The classification model was trained applying RF with 500
iterations and then utilized to classify the validation tests as well as the continuing test delineated as.
𝜌𝜎2
+
1−𝜌
𝐵
𝜎2
(4)
Where the expectation of an average 𝐵 value of such trees is the same as the expectation of any one of them.
An average of 𝐵 variables randomly, each with the variance 𝜎2
, has a variance of
1
𝐵
𝜎2
, positive correlation in
pairs 𝜌, the average variance.
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4.4.3. Decision tree
The machine learning techniques are better than traditional approaches and remote sensing
applications are increasingly used to monitor the change of mangrove forest from series data in distant
wetland research. Recent research has demonstrated the effective usage of 𝐷𝑇 learning in remote sensing. It
is one of the most popular techniques in mangrove studies. It promotes various machine learning approaches
and has various advantages such as being very accurate, cost-effective, time-efficient in land-cover
classification, based on remote saving, and providing long-term data access [28]. Therefore, the purpose of
this research is to develop straight from the training classification criteria for researching the𝐷𝑇 learning
data's capacity without human participation. In addition, 𝐷𝑇 does not use multi-temporary Landsat data
ranges like the max-forest cover in seven provinces, unlike other analytical statistical techniques for
classification and detection of changes 𝐷𝑇 [29] as:
𝐿𝑀(𝑥) = ∑ 𝑤𝑖 𝑣𝑖(𝑥) (5)
Where 𝑣𝑖(𝑥) is the value of attribute 𝐴𝑖; 𝑥 and 𝑤𝑖 are weights. The attributes used in the path of the tree can
be ignored.
4.4.4. Object-based NN classification
In object-based classification, segmentation is the process of finding pixel clusters with comparable
properties and can generate objects of varying numbers and dimensions based on spectral seamlessness and
compactness thresholds. There can be a hierarchy of segmentation levels extending from a few large items to
numerous little objects with each object belonging to a huge object at a higher segmentation level and
reduced objects on a lower level. The spectral attributes of each object include not only statistical values such
as maximum, minimum, and standard variation of each band but also median value for each band from the
pixels participating in the object. All these variables can be utilized during the classification process to
support the discrimination of objects and their correct position to the land-use cover classes [30]. The classes
are constructed according to a tree-like hierarchy in order to inherit the higher-level super-class features in
the classification tree in a similar way to the object connection. the lower structural levels. In this study, the
image was segmented using the cluster merging method, which starts with pixel-sized objects and iteratively
matures to combine tiny objects into a bigger one of the image objects until the homogeneous threshold is
exceeded. The homogeneous threshold is concluded by user-defined parameters such as shape, scale, color,
compactness, smoothness, and image layer weights, with the scale being the most essential parameter,
directly controlling the measure of object images. The object-based NN classification method is utilized in
this study to distinguish three mangrove varieties and surrounding land-use types, with the NN algorithm
achieving an overall accuracy more than 93.22%. The criteria or attributes mentioned above were used to
label the objects and for further object-based nearest neighbor (NN) classification. This supervised
classification methods allows all objects to be classified in a whole picture based on the selectable samples
and statistics [31].
𝑓 = ∑ 𝑊𝑖
𝑖
𝑖=1 ( 𝑀
𝑛
𝜎𝑀 − ( 𝑜
𝑛
𝑏𝑗1𝜎𝑜𝑏𝑗1 + 𝑜
𝑛
𝑏𝑗2𝜎𝑜𝑏𝑗2)) (6)
Where 𝑛 is the number of bands and 𝑊𝑖 is the weight of the current band, 𝑀
𝑛
, 𝑜
𝑛
𝑏𝑗1 , and 𝑜
𝑛
𝑏𝑗2 are the
number of pixels within the merged object, initial object 1, and initial object 2, respectively. Symbols 𝜎𝑀,
𝜎𝑜𝑏𝑗1, and 𝜎𝑜𝑏𝑗2 are the variances of the merged object, initial object 1, and initial object 2, respectively,
derived from the local tone heterogeneity and weighted by the size of the object images and summed over 𝑛
image bands. After the segment of an image is done, it is subsequently classified as an object-based
classification at the segment level.
5. RESULTS AND DISCUSSION
Both the USGS dataset and time-series Landsat sensor data were applied in this study. From 2001,
the main cause of the mangrove forests was the settlement of the mudflats. Mapping was used to quantify
these areas, where tree loss may have occurred at any point throughout the period of the time series, by
considering three features: tree cover loss, aboveground CO2 emissions, and aboveground biomass loss for
the years 2001-2020. A rising rule was then applied to categorize the remaining tree loss locations which
were not detected in the tree cover. The expanding rule barrier was raised. However, objects were only
involved in the iterative process of tree cover loss if they shared a border with those already classified as
trees. The growth rule was applied to finalize the tree cover classification and the findings were then utilized
to determine changes of mangrove cover, with three stated characteristics to make it clearer.
6. Bulletin of Electr Eng & Inf ISSN: 2302-9285
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5.1. Training data selection
The satellite imagery was used in this research to map land use in the study region by means of
training data. First, the classification key was formulated using a high-resolution imagery map acquired (3-5
km spatial resolution) from the seven provinces inside the Gulf of Thailand following a stratified random
sampling strategy conducted with datasets. Training and validation data collected from [32] the University of
Maryland, Google, USGS, and NASA (2001-2019), for this study using a predictive model to obtain the
dataset for 2020. A large training set of 17 classes based on 17 provinces in the Gulf of Thailand was
validated using 10-fold cross-validation, with 99.6% accuracy achieved. However, we then reduced the
number of provinces to seven to reduce the training data while making the study more challenging, achieving
an accuracy of 96.86%. The training data consisted of three features, namely tree cover loss, aboveground
CO2 emissions, and aboveground biomass loss over 20 years from 2001-2020. For classification and
validation over 20 years, the training and testing datasets were divided into 80% and 20%, respectively [33].
Finally, four machine-learning methods (SVM, RF, DT, and NN) were selected to train the dataset. The
results of the training were then tested for model development. Figure 2 illustrates the architecture of the
classification process for mangrove forest models using the method proposed in this study.
Figure 2. The architecture of classification process for mangrove forest models
5.2. Evaluation and measurement
In the area ratio of seven classes (provinces) to data training and testing, 700 samples for three
characteristics were taken in seven provinces, 80% were randomly picked for classifier modelling and 20%
were randomly selected for independent accuracy checks. Due to inaccessible circumstances and difficulties
in reaching each province, as well as complications in accessing and covering all the information due to
COVID 19 pandemic situation, we focused on this research to cover all deForest ation on the coast of the
Gulf of Thailand in the study. Changes in the extent of mangrove forest s were observed across all provinces
under study due to both natural and anthropogenic drivers of change. During the period 2001-2020, no region
had an intact mangrove extent, with anthropogenic disturbance/removal occurring in all of the sites. The
conversion of mangrove to aquaculture and agriculture (especially notable in the Gulf of Thailand provinces)
was the most prevalent source of anthropogenic-induced change, which was virtually exclusively restricted to
Thailand. Whereas this distinguishes the topographical dispersion of forest loss, it does not convey the extent
to which the training happened. Several areas in Southern Thailand exhibited a localized loss. Land
conversion for large-scale agriculture such as palm oil; shrimp framing, illegal logging is some of the
primary drivers of deForest ation in Thailand and road and infrastructure development acted as an indirect
driver, opening up new areas for timber harvesting. The transformation of mangroves into commercial shapes
of nourishment and asset generation has been widely observed. The foremost common cause of
anthropologically initiated alter was the transformation of mangroves into aquaculture/agriculture; the
majority of which occurred in the areas of the gulf. Natural mangrove loss and advancement processes were
regularly observed and widely distributed, arising in all areas. This study has recognized locales of seriously
alter, both in mangrove gain and loss, and increased future monitoring is recommended. Where TP is true
positive (positive issue of correct segmentation), TN is the true negative (negative effect of appropriate
segmentation), FP is false positive (incorrect segmentation of a positive issue), and FN is false negative
(negative point of incorrect segmentation). In evaluating the three features under study, namely tree cover
loss, aboveground CO2 emissions, and aboveground biomass loss for the years 2001-2020, seven out of the
17 provinces in the Gulf of Thailand exhibit positive values.
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𝑇𝑁𝑅 =
𝑇𝑁
𝑇𝑁+𝐹𝑃
× 100% (7)
𝑇𝑃𝑅 =
𝑇𝑃
𝑇𝑃+𝐹𝑁
× 100% (8)
𝐹1 =
2𝑇𝑃
2𝑇𝑃+𝐹𝑃+𝐹𝑁
× 100% (9)
𝐴𝐶𝐶 =
𝑇𝑃+𝑇𝑁
𝑇𝑃+𝑇𝑁+𝐹𝑃+𝐹𝑁
× 100% (10)
We calculate the classifiers performance concerning various execution measurements such as recall,
precision, F-measure, accuracy region under ROC curve, and gamma measurement. The mean absolute error
𝐸𝑛 of a particular a variable 𝑛 is calculated by (11):
𝐸𝑛 =
1
𝑠
∑ |𝑃(𝑛𝑚) − 𝑇𝑚|
𝑠
𝑚=1 (11)
Where 𝑃(𝑛𝑚) is the value predicted by the specific variable 𝑛 for a sample issue𝑚, and 𝑠 is sample instances;
𝑇𝑚 is the target value for a sample issue𝑚. For a great fitting, 𝑃(𝑛𝑚) = 𝑇𝑚 then 𝐸𝑛 = 0 so, the 𝐸𝑛 value is
index ranges from 0to ∞, with 0 equivalent to the model [34]. There are distinct errors related to a simple
predictor such as the relative absolute error is relative to a simple predictor, which is the average of the real
values. In this issue of mangrove forest, though, the error is the overall absolute error instep of the total
squared error. Consequently, the relative absolute error requires the overall absolute error and normalizes it
by separating by the overall absolute error of the predictor. We calculate the relative absolute error 𝐸𝑛 (12).
𝐸𝑛 = ∑ |𝑃(𝑛𝑚)
𝑠
𝑚=1 − 𝑇𝑚|/ ∑ |𝑇𝑚
𝑠
𝑚=1 − 𝑇
̄| (12)
Where we calculate the value of 𝑇
̄ to the left side from (12) to (13), which 𝑠 is sample instances.
𝑇
̄ =
1
𝑠
∑ 𝑇𝑚
𝑠
𝑚=1 (13)
We compute the root mean squared error, which is the square root from (13), and root relative squared error
is square root is calculated on (14).
𝐸𝑛 = √
∑ (𝑝(𝑛𝑚)−𝑇𝑚)2
𝑠
𝑚=1
∑ (𝑇𝑚−𝑇
̄ )2
𝑠
𝑚=1
(14)
Ten-fold cross-validation was applied to test the feasibility of distinct models. In the cross-validation
procedure, a portion of data is kept aside, and it is being arranged by the remaining data for three features and
7 Provinces. Moreover, the process is common for various parts of the data by starting with 100 iterations
and base learner. The portions are selected based on the value of k. The 10-fold cross-validation was used
here implies data is divided into 10 parts [32]. Kappa statistic coefficient was developed to validate the
nearness of the subjects that were displayed. The Kappa coefficient is a statistical measure of inter-rater
unwavering quality or assertion that is utilized to evaluate subjective reports and decide assertion between
two raters. We calculated by using the statistic formula defined by [35].
𝐾𝑎𝑝𝑝𝑎 𝑠𝑡𝑎𝑡𝑖𝑠𝑡𝑖𝑐 𝑐𝑜𝑒𝑓𝑓𝑖𝑐𝑖𝑒𝑛𝑡 =
𝑘𝑎−𝑘𝑐
1−𝑘𝑐
(15)
𝑘𝑎 =
𝑇𝑃+𝑇𝑁
𝑇𝑃+𝑇𝑁+𝐹𝑃+𝐹𝑁
= 𝐴𝑐𝑐𝑢𝑟𝑎𝑐𝑦% (16)
𝑘𝑐 =
(𝑇𝑃+𝐹𝑁)×(𝑇𝑃+𝐹𝑃)+(𝐹𝑃+𝑇𝑁)×(𝐹𝑁+𝑇𝑁)
(𝑇𝑃+𝑇𝑁+𝐹𝑃+𝐹𝑁)2 (17)
Where 𝑘𝑎 is a likelihood of success classification, and 𝑘𝑐 is a likelihood of success due to the chance to
estimate the kappa statistic coefficient. The cross-validation accuracy of machine learning methods such as
FR, HMM, and RBM for applied Kappa statistics coefficient algorithm is greater than 9 so it is excellent
results shown in Table 1.
Error rate (𝑅𝐸): ER predicted is an assessment of the likelihood of an error happening amid the completion of an
assignment. Error rate predicted is utilized to decrease the probability of mistakes happening within the future [35].
𝐸𝑟𝑟𝑜𝑟𝑅𝑎𝑡𝑒 =
𝐹𝑁+𝐹𝑃
𝑇𝑃+𝑇𝑁+𝐹𝑁+𝐹𝑃
(18)
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Assessing mangrove deforestation using pixel-based image: a machine learning … (Ahmad Yahya Dawod)
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Table 1. Comparison of the error between four methods for CO2
Errors RF SVM DT NN
Kappa statistic coefficient (k) 0.94 0.979 0.985 0.991
Mean Absolute Error (MAE) 0.001 0.002 0.007 0.006
Root Mean Squared Error (RMSE) 0.030 0.038 0.040 0.035
Relative Absolute Error (RAE) 11.327 12.738 9.049 7.232
Root Relative Squared Error (RSE) 15.114 18.731 19.839 17.620
Matthew’s correlation coefficient (𝑀𝐶𝐶): 𝑀𝐶𝐶 is employed in machine learning as a measure of the value of
binary (two-class) classifications. Its true positives, false negatives division with, false negatives, and false
positives is commonly considered as acknowledged as an adjusted degree that may be used even when the
classes are of extremely different sizes [36].
𝑀𝐶𝐶 =
(𝑇𝑃∗𝑇𝑁)−(𝐹𝑃+𝐹𝑁)
√(𝑇𝑃+𝐹𝑃)(𝑇𝑃+𝐹𝑁)(𝑇𝑁+𝐹𝑃)(𝑇𝑁+𝐹𝑁)
(19)
After comparing the performance of four machine learning algorithms (SVM, RF, DT, NN),
classified on the basis of the accuracy obtained, the results for the seven provinces out of 17 in the Gulf of
Thailand showed better mangrove class as well as other classes. The RF classifier received higher values for
precision, recall, F-score, while also achieving a higher overall accuracy of 97.96%. This could be because
characteristically, the SVM has difficulty in training a good model if there are many training samples and
instances of 10-fold cross-validation. In mangrove mapping, many training samples are required to
differentiate classes, specifically mangroves from other trees. On the other hand, due to their construction,
RF, DT, and NN can handle a large amount of training data. This study applied a confusion matrix involving
four machine-learning models: SVM, RF, DT, and object based NN classification. Tables 2 (a)-(d) shows the
SVM, RF, DF, and NN algorithm in the confusion matrix of CO2 with an accuracy of 93.17%. Carbon
emissions reflect the carbon dioxide emitted to the atmosphere because of aboveground live-forest ed
biomass loss. All biomass loss is “committed” radiations to the atmosphere upon the clearing, despite the fact
that there are periods of low activity due to a few reasons of tree death. Emissions are "gross" estimates
rather than "net" estimates, which means that due to a present lack of accurate data, data on the fate of the
land after clearance, as well as its carbon value, is not incorporated. Emissions related with other carbon
pools, such as shown in ground biomass, deadwood, litter, and soil carbon, are excluded from the files. Loss
of biomass, like loss of tree cover, may arise for numerous reasons, involving deForest ation, fire, and
monitoring within the course of forest ry operations. Table 2 (b) shows the confusion matrix value by
accuracy 96.80% using the dataset for classes of classification random forest (RF) method. As shown in
Figure 3, the performance of the four machine learning methods was assessed using precision recall and F-
score parameters, which were categorized according to the seven provinces for CO2 emissions.
Table 2. These tables are, (a) CO2 emissions (SVM model), (b) CO2 emissions (RF model), (c) CO2
emissions (DT model), (d) CO2 emissions (NN model)
(a) (b)
True
Label
a b c d e f g
True
Label
a b c d e f g Class
a 48 0 1 0 0 0 0 a 48 0 1 0 0 0 0 Trat
b 0 53 2 0 1 0 0 b 0 52 2 0 0 0 2 Rayong
c 0 0 70 0 0 0 0 c 0 0 68 0 0 0 2 Chanthaburi
d 0 0 0 21 0 0 0 d 0 0 0 21 0 0 0 Samut Sakhon
e 0 0 0 1 20 0 0 e 0 0 0 0 21 0 0
Samut
Songkhram
f 1 0 0 1 0 129 2 f 0 0 0 0 0 132 1 Surat Thani
g 0 0 0 1 0 0 160 g 1 0 0 0 0 1 159
Nakhon Si
Thammarat
Predicated Label
(c) (d)
True
Label
a b c d e f g
True
Label
a b c d e f g Classified as
a 46 1 2 0 0 0 0 a 40 3 2 2 0 2 0 Trat
b 0 52 2 1 0 0 1 b 0 49 4 1 2 0 0 Rayong
c 0 2 66 2 0 0 0 c 1 4 61 1 0 0 3 Chonburi
d 0 0 0 20 0 0 1 d 0 0 0 20 0 0 1 Samut Sakhon
e 0 0 0 1 20 0 0 e 0 0 1 1 18 0 1
Samut
Songkhram
f 0 0 0 0 0 130 3 f 0 1 0 0 0 123 9 Surat Thani
g 0 0 0 1 1 2 157 g 1 1 2 1 1 5 150
Nakhon Si
Thammarat
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Figure 3. The performance of our four statistical measurement algorithms for seven provinces of CO2 to
show precision, recall, and F-score methods
Four classification algorithms were used in the confusion matrix for seven provinces. Tables 3 (a)-(d)
present the aboveground biomass classifications for SVM, RF, DT, and NN, respectively. Figure 4 shows the
performance results of the four machine learning algorithms for above-ground biomass, with SVM, RT, DT,
and NN achieving 95.84%, 98.96%, 96.92%, 94.88% accuracy, respectively. The comparative error values of
K, MAE, RMSE, RAE, & RSE for all the four methods for aboveground biomass is provided in Table 4.
Table 3. These tables are, (a) aboveground biomass (SVM), (b) aboveground biomass (RF), (c) aboveground
biomass (DT), (d) aboveground biomass (NN)
(a) (b)
True
Label
a b c d e f g
True
Label
a b c d e f g classified as
a 7 0 0 0 0 0 0 a 7 0 0 0 0 0 0 Trat
b 0 6 0 0 1 0 0 b 2 5 0 0 0 0 0 Rayong
c 1 0 6 0 0 0 0 c 1 0 6 0 0 0 0 Chanthaburi
d 0 0 0 7 0 0 0 d 0 0 0 7 0 0 0 Samut Sakhon
e 0 0 0 0 7 0 0 e 0 0 0 0 7 0 0 Samut Songkhram
h 0 0 0 0 0 7 0 f 0 0 0 0 0 7 0 Surat Thani
f 0 0 0 0 0 0 7 g 0 0 0 0 0 0 7 Nakhon
Si Thammarat
Predicated Table
(c) (d)
True
Label
a b c d e f g
True
Label
a b c d e f g classified as
a 6 1 0 0 0 0 0 a 7 0 0 0 0 0 0 Trat
b 0 7 0 0 0 0 0 b 0 6 0 0 1 0 0 Rayong
c 0 0 7 0 0 0 0 c 1 0 6 0 0 0 0 Chanthaburi
d 0 0 0 7 0 0 0 d 0 0 0 7 0 0 0 Samut Sakhon
e 0 0 0 0 7 0 0 e 0 0 0 0 7 0 0 Samut Songkhram
f 0 0 0 0 0 7 0 f 0 0 0 0 0 7 0 Surat Thani
g 0 0 0 0 0 0 7 g 0 0 0 0 0 0 7 Nakhon
Si Thammarat
Figure 4. The performance of precision, recall and F-score methods by using four statistical measurement
algorithms for seven provinces of aboveground biomass
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Table 4. Comparison of the error between four methods for aboveground biomass
Errors RF SVM DT NN
Kappa statistic coefficient (k) 0.976 0.954 0.991 0.935
Mean Absolute Error (MAE) 0.005 0.023 0.002 0.014
Root Mean Squared Error (RMSE) 0.053 0.062 0.038 0.114
Relative Absolute Error (RAE) 2.298 10.735 16.292 6.4355
Root Relative Squared Error (RSE) 16.168 18.840 11.502 10.934
The tree cover can take the shape of natural woods or pasture in various densities surrounding a
canopy, as the whole vegetation more than 5 m is defined. Loss is the removal or death of the covering of the
tree and can be due to a number of reasons, such as mechanical fawning, disease, fire, and storm damage.
The loss is therefore not like deForest ation. Pixels of loss are covered corresponding to the concentration of
loss at around 30 x 30 m scale. The darker Pixels are shading embody regions with a greater thickness of tree
cover loss, but brighter pixels shading indicate a smaller intensity of tree cover loss. Once the information is
at a full resolution since not have any change in pixel shading.
In this study, four statistical measurements are involved for determining the tree loss in seven
provinces, and this study attempts to modify these parameters to provide high accuracy for SVM, RF, DT,
and NN of 94.27, 97.34, 96.20, 95.55%, respectively. Tables 5 (a)-(d) show the tree cover loss classifications
confusion matrix for SVM, RF, DT, and NN, respectively. Figure 5 presents the performance results of the
four machine learning methods for tree cover loss. The comparative error values of K, MAE, RMSE, RAE, &
RSE for all the four methods for treecover loss is provided in Table 6.
Table 5. These tables are, (a) classification of tree cover loss (SVM), (b) classification of tree cover loss
(RF), (c) classification of tree cover loss (DT), (d) classification of tree cover loss (NN)
(a) (b)
True
Label
a b c d e f g
True
Label
a b c d e f g Class
a 48 0 1 0 0 0 0 a 48 0 1 0 0 0 0 Trat
b 0 53 2 0 1 0 0 b 0 52 2 0 0 0 2 Rayong
c 0 0 70 0 0 0 0 c 0 0 68 0 0 0 2 Chonburi
d 0 0 0 21 0 0 0 d 0 0 0 21 0 0 0
Samut
Sakhon
e 0 0 0 1 20 0 0 e 0 0 0 0 21 0 0
Samut
Songkhram
f 1 0 0 1 0 129 2 f 0 0 0 0 0 132 1 Surat Thani
g 0 0 0 1 0 0 160 g 1 0 0 0 0 1 159
Nakhon Si
Thammarat
Predicated Label
(c) (d)
True
Label
a b c d e f g
Ture
Label
a b c d e f g Class
a 46 1 2 0 0 0 0 a 40 3 2 2 0 2 0 Trat
b 0 52 2 1 0 0 1 b 0 49 4 1 2 0 0 Rayong
c 0 2 66 2 0 0 0 c 1 4 61 1 0 0 3 Chonburi
d 0 0 0 20 0 0 1 d 0 0 0 20 0 0 1
Samut
Sakhon
e 0 0 0 1 20 0 0 e 0 0 1 1 18 0 1
Samut
Songkhram
f 0 0 0 0 0 130 3 f 0 1 0 0 0 123 9 Surat Thani
g 0 0 0 1 1 2 157 g 1 1 2 1 1 5 150
Nakhon Si
Thammarat
Figure 5. Tree cover loss feature involved the four classification methods for showing the performance of
precision recall and F-score
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Table 6. Comparison of the error between four methods for tree cover loss
Errors RF SVM DT NN
Kappa statistic coefficient 0.922 0.934 0.991 0.935
Mean Absolute Error 0.003 0.004 0.002 0.005
Root Mean Squared Error 0.041 0.045 0.029 0.034
Relative Absolute Error 13.324 11.657 16.301 9.608
Root Relative Squared Error 17.081 19.550 12.301 11.234
6. CONCLUSION
This study offers the initial assessment of changes in the mangrove forest range over the period 2001-
2020 using SVM, RF, DT, and NN. In this paper, only seven provinces are presented to provide time series data
on the influence of terrain change and climate scenarios with various levels of accuracy obtained by the
algorithms for each province. This study proposes an alternative approach by using three features: tree cover
loss, aboveground CO2 emissions, and aboveground biomass loss from 2001-2020 with different values for
each feature. This approach can be tested using an alternative location to check its appropriateness for diverse
data. Moreover, based on the data and classifier performance, the SVM, RF, DT, and NN performed well in
mangrove classification achieving 95.84%, 98.96%, 96.92%, 94.88%, but it should be noted that RF performed
better than the other three algorithms in areas with no orthophotography. In addition, RF Better performance in
terms of accuracy since it achieved higher values in precision, recall, F-score and overall accuracy when
comparing the three features. Future work should involve the selection of all seventeen provinces, involving
several mangrove features in the Gulf of Thailand, as well as more machine learning approaches for higher
precision and efficiency, such as Neural Network models and deep learning.
ACKNOWLEDGEMENTS
We thank the anonymous reviewers for their valuable comments and suggestions for improving the paper.
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13. ISSN: 2302-9285
Bulletin of Electr Eng & Inf, Vol. 10, No. 6, December 2021 : 3178 – 3190
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BIOGRAPHIES OF AUTHORS
Ahmad Yahya Dawod, he is currently a lecturer at International College of Digital Innovation
Chiang Mai University, Chiang Mai, Thailand. He received his BSc from the Faculty of
Computer Science at Al-Mustansiriya University, Iraq in 2006. He completes his Master
degree from the Faculty of Computing and informatics at Multimedia University - MMU
Cyberjaya, Malaysia in 2012. He completes his Ph.D. from the Faculty of information science
and technology at National University of Malaysia in 2018. His research interests include
Artificial Intelligent, Machine Learning, Pattern Recognition, computer vision, Image
Processing, and Medical Image Analysis.
Mohamed Ali Sharafuddin currently works as a lecturer at the College of Maritime Studies
and Management, Chiang Mai University. His research interest is in “Blue economy” with
special focus on Coastal, marine and Maritime areas and wellness Tourism. His most recent
and working projects are, "Coastal, Marine and Maritime Tourism" and “electronic images”.
He also actively works on projects in "Maritime marketing". His other interests include
scientometrics, Structural Equation Modeling, prediction modeling and econometrics for both
maritime and tourism business.