Generation of high resolution DSM using UAV Images Nepal Flying Labs
A final year project by Geomatics Engineering Students at Kathmandu University,Dhulikhel,Kavre.
All the datasets required for this project have been downloaded from the popular Trimble Company.This project makes use of 27 high resolution (2.4 cm average spatial resolution) UAV-acquired images of a sand mine at Tielt-Winge, Belgium . These images have been acquired by a Sony Nex-5R digital camera mounted on a Trimble UX5 Imaging Rover, a fixed wing UAV. Three software: LPS, AgiSoft PhotoScan and PIX4D were used for image processing.
The team members:
1.Uttam Pudasaini : utmpudasaini@hotmail.com
2.Niroj Panta : sadrose777@gmail.com
3.Biplov Bhandari : bionicbiplov45@gmail.com
4.Upendra Oli : Upendraoli@gmail.com
Explore the findings of McCain McMurray, Remote Sensing Specialist at NewFields, who surveyed an open pit mine in New Mexico to assess the accuracy of the senseFly eBee mapping UAS (UAV/drone).
The summary discusses the RMUASP April Virtual Meetup agenda and announcements. It mentions that several in-person events were postponed due to COVID-19, including the Spring UAS Round Up in April and Xponential in May. Pix4D then presented on their new photogrammetry products, including Pix4Dmapper, Pix4Dreact, Pix4Dfields, Pix4Dsurvey, Pix4Dmatic, Pix4Dscan, and Pix4Dinspect. They also discussed their training platform and opportunities for certification.
DSD-INT 2015 - Photogrammetric workflows and use of UA VS, Francesco nex, E-s...Deltares
The document discusses the use of unmanned aerial vehicles (UAVs) for earth observation applications. It provides an overview of UAV classification systems and discusses photogrammetric workflows using UAV imagery. Common applications described include urban monitoring, environmental monitoring, agriculture/forestry, and archaeological documentation. Both pros and cons of UAVs for earth observation are presented, noting their flexibility but also technological and regulatory limitations.
We compared the accuracy of geospatial data derived from a RPAS and an RTK GPS
Aim: To understand the mapping applications RPAS can deployed for
Objective: By the end of this presentation the audience will be able to list the horizontal and vertical accuracies achieved by a RPAS
Check http://www.rpas.ie
Modern surveying instruments like total stations have replaced traditional tools. Total stations combine an electronic theodolite and distance meter to precisely measure horizontal and vertical angles as well as slope distances to determine point coordinates. They automate data collection and calculations in the field, transferring soft data to computers for mapping. Total stations offer accurate, fast surveying and are widely used in engineering, archaeology, accident reconstruction and more.
Total station and its application to civil engineeringTushar Dholakia
Total stations are surveying instruments that combine an electronic theodolite, electronic distance meter, and on-board computer. They allow users to measure horizontal and vertical angles as well as slope distances to calculate coordinates. Modern total stations can store thousands of data points, perform computations, and transfer data remotely via memory cards or wireless connections. They have largely replaced standalone theodolites and distance meters due to greater accuracy, automation, and data processing capabilities. Total stations find wide application in civil engineering, mining, accident reconstruction, and other fields requiring precise spatial measurements and positioning.
Modern surveying techniques utilizes advanced electronic equipment for measuring distances, angles, and elevations. This includes digital levels that use electronic image processing of barcoded staff readings, total stations that integrate distance and angle measurements, and electromagnetic distance measurement instruments. Remote sensing involves analyzing sensor data such as satellite imagery to obtain information about areas without direct contact. It has various applications including agriculture, urban planning, hydrology, and disaster management by aiding tasks such as early warning, damage assessment, and recovery efforts.
Generation of high resolution DSM using UAV Images Nepal Flying Labs
A final year project by Geomatics Engineering Students at Kathmandu University,Dhulikhel,Kavre.
All the datasets required for this project have been downloaded from the popular Trimble Company.This project makes use of 27 high resolution (2.4 cm average spatial resolution) UAV-acquired images of a sand mine at Tielt-Winge, Belgium . These images have been acquired by a Sony Nex-5R digital camera mounted on a Trimble UX5 Imaging Rover, a fixed wing UAV. Three software: LPS, AgiSoft PhotoScan and PIX4D were used for image processing.
The team members:
1.Uttam Pudasaini : utmpudasaini@hotmail.com
2.Niroj Panta : sadrose777@gmail.com
3.Biplov Bhandari : bionicbiplov45@gmail.com
4.Upendra Oli : Upendraoli@gmail.com
Explore the findings of McCain McMurray, Remote Sensing Specialist at NewFields, who surveyed an open pit mine in New Mexico to assess the accuracy of the senseFly eBee mapping UAS (UAV/drone).
The summary discusses the RMUASP April Virtual Meetup agenda and announcements. It mentions that several in-person events were postponed due to COVID-19, including the Spring UAS Round Up in April and Xponential in May. Pix4D then presented on their new photogrammetry products, including Pix4Dmapper, Pix4Dreact, Pix4Dfields, Pix4Dsurvey, Pix4Dmatic, Pix4Dscan, and Pix4Dinspect. They also discussed their training platform and opportunities for certification.
DSD-INT 2015 - Photogrammetric workflows and use of UA VS, Francesco nex, E-s...Deltares
The document discusses the use of unmanned aerial vehicles (UAVs) for earth observation applications. It provides an overview of UAV classification systems and discusses photogrammetric workflows using UAV imagery. Common applications described include urban monitoring, environmental monitoring, agriculture/forestry, and archaeological documentation. Both pros and cons of UAVs for earth observation are presented, noting their flexibility but also technological and regulatory limitations.
We compared the accuracy of geospatial data derived from a RPAS and an RTK GPS
Aim: To understand the mapping applications RPAS can deployed for
Objective: By the end of this presentation the audience will be able to list the horizontal and vertical accuracies achieved by a RPAS
Check http://www.rpas.ie
Modern surveying instruments like total stations have replaced traditional tools. Total stations combine an electronic theodolite and distance meter to precisely measure horizontal and vertical angles as well as slope distances to determine point coordinates. They automate data collection and calculations in the field, transferring soft data to computers for mapping. Total stations offer accurate, fast surveying and are widely used in engineering, archaeology, accident reconstruction and more.
Total station and its application to civil engineeringTushar Dholakia
Total stations are surveying instruments that combine an electronic theodolite, electronic distance meter, and on-board computer. They allow users to measure horizontal and vertical angles as well as slope distances to calculate coordinates. Modern total stations can store thousands of data points, perform computations, and transfer data remotely via memory cards or wireless connections. They have largely replaced standalone theodolites and distance meters due to greater accuracy, automation, and data processing capabilities. Total stations find wide application in civil engineering, mining, accident reconstruction, and other fields requiring precise spatial measurements and positioning.
Modern surveying techniques utilizes advanced electronic equipment for measuring distances, angles, and elevations. This includes digital levels that use electronic image processing of barcoded staff readings, total stations that integrate distance and angle measurements, and electromagnetic distance measurement instruments. Remote sensing involves analyzing sensor data such as satellite imagery to obtain information about areas without direct contact. It has various applications including agriculture, urban planning, hydrology, and disaster management by aiding tasks such as early warning, damage assessment, and recovery efforts.
Technological advances have created efficiencies in both land and topographical surveying. Total stations, satellite positioning systems, GIS software and 3D scanners have advanced the capabilities of surveying. Municipalities benefit from these advances with reduction in staffing needs; creation of safer and quicker processes; and production of more precise work.
Modern surveying methods and instrumentsATHIRA B K
EDM uses modulated microwave or infrared signals to measure distance. The distance is determined by emitting multiple frequencies and calculating the number of wavelengths to the target. Total stations integrate EDM, digital data storage, and angle measurement to provide position coordinates of points. GPS uses satellite triangulation to determine 3D position within meters by measuring signals from four satellites. It has made surveying faster and more efficient but relies on clear satellite signals.
This application, installed in a pocket PC, allows the user to survey and stake out topographical data using a wide range of total stations, connected through a standard cable or through wireless Bluetooth technology. In motorised stations, the software will automatically direct the device to the desired location. The program provides numerous options and may be used for traditional mapping or surveying, and for projects involving linear works.
Mapping From Unmanned Aircraft System (UAV)Nasr Khashoggi
The document provides an agenda and summaries of presentations given at a UAV workshop. The agenda includes introductions to general presentations on GTT and GATEWING UAV systems, as well as a break and a presentation on using the GATEWING X100 for work. The Gatewing presentation summarizes the company's products and services, including its X100 UAV used for aerial imaging, image processing software, and data products like orthophotos and digital surface models created from UAV images.
Total station is a modern surveying instrument that combines an electronic theodolite and electronic distance meter. It allows the user to determine coordinates of points by measuring horizontal and vertical angles and slope distances to a reflector target simultaneously. The total station records measurements directly into its internal microprocessor, allowing precise data collection and processing without manual calculations. It has made surveying work faster, more accurate and less tedious compared to traditional instruments.
This document discusses modern surveying techniques and technologies. It begins by defining surveying and its objectives such as collecting field data and preparing maps. It then describes several key pieces of modern surveying equipment - digital levels, electro-magnetic distance measurement instruments (EDMI), total stations, and remote sensing. For each, it provides details on how they work, their features and applications. Remote sensing in particular discusses how satellite imagery can support disaster management activities such as mitigation, preparedness, response and recovery for cyclones, earthquakes, floods and other hazards.
The 2016 Remote Sensing Field camp will take the form of two projects.
A low tech, low cost aerial photography project using visible spectrum UAV/Ultralight Aircraft mounted cameras as the sensor to demonstrate that relatively low tech, low cost solutions can achieve surprisingly good results when compared to more commercial systems.
A more high tech, high cost terrestrial LiDAR collect of a building or structure of historical or architectural significance.
The scope of a project will influence all other aspects of the project, including its cost, timing, quality and risk.
This document provides information about GPS (Global Positioning System) and planimeters. It describes the three main parts of GPS as satellites, receivers, and software. It explains how GPS works by using signals from satellites to calculate a receiver's distance and position on Earth. Examples of GPS applications include navigation, agriculture, surveying, and more. The document also gives an overview of how planimeters can be used to accurately measure the area of any shape on a plane or map. It describes the two main types of planimeters as polar and roller planimeters.
What is a Total Station?
Capability of a Total Station
Important Operations of Total Station
Uses of Total Station
Advantages of Using Total Stations
Applications
Electronic distance measurement (EDM) instruments use infrared, laser, or microwave signals to measure distances. Total stations integrate EDM, angle measurement, and data processing capabilities. They can determine coordinates, elevations, distances, and areas with accuracy from 0.5 to 5 seconds for angles and 1.6 to 3 km for distances. Total stations are used for tasks like point location, trigonometric leveling, resection, layout, and remote elevation measurement through the use of prisms and various field techniques.
This document provides an overview of electronic distance measuring (EDM) devices and total stations used for surveying. It discusses the history and evolution of surveying techniques from manual methods to modern EDMs and total stations. Key points covered include:
- How total stations integrate an electronic theodolite and EDM to measure angles and distances, then use trigonometry to calculate coordinates.
- Features of Pentax total stations like automatic environmental sensing, auto focusing, and narrow visible beams that improve accuracy and efficiency.
- Software tools like Power Topolite, PSF, and Pythagoras that support data collection, calculations, stakeout, and CAD functions on Pentax total stations.
Surveying techniques have a long history dating back to ancient Egypt in 3000 BC. Precise surveying was important for projects like the Great Pyramids of Giza. In later centuries, surveying was critical for territorial expansion in countries like India and America. Modern surveying methods increasingly utilize electronic devices like total stations, GPS, mobile mapping, and airborne laser scanning to gather precise geographic data.
This document provides instructions on using the programs and functions of a total station for remote elevation measurement, missing line measurement, area calculation, and data collection. It describes procedures for using the total station to remotely measure elevations when direct prism placement is not possible. It also outlines the two modes for missing line measurement to obtain distance, slope distance, elevation, and horizontal angle between two target prisms. The document details procedures for calculating areas of closed figures using coordinate data or direct measurement. It provides guidance on field work including data collection in distance, angle, and coordinate modes as well as instructions for instrument and operation maintenance.
Experience on using total station surveying for mapping and contouringIAEME Publication
This document describes the experience of using a total station to map and create contours of a large university campus. Key points:
- A total station was used to efficiently collect planimetric and elevation data across the 1.5km x 2.5km campus to update existing inaccurate maps.
- Over 700-1000 points per day could be collected using one or more prisms simultaneously. Precise procedures were developed to quickly collect data for both mapping and contouring.
- In the office, data files from each instrument setup were processed individually in Excel and drawn in AutoCAD. Files were then combined and aligned to create a unified campus map and contour lines.
This document summarizes various modern surveying equipment used for mapping and construction projects, including:
- Electronic distance measurement (EDM) devices and total stations that integrate EDM to measure distances electronically.
- Automatic and digital levels used to measure elevations and slopes accurately and efficiently.
- Global positioning systems (GPS) that use satellites to determine precise locations on Earth.
- Key principles, components, operations, and uses of total stations are described, which integrate distance measurement, angle measurement, and data recording into one portable instrument.
Poster Presentation "Generation of High Resolution DSM Usin UAV Images"Nepal Flying Labs
UAV images were used to generate high resolution digital surface models (DSMs). PIX4D software produced the most accurate DSMs, with errors less than 2 cm compared to ground control points. For areas with repetitive patterns or vegetation, classical photogrammetry algorithms in LPS performed poorer than computer vision approaches in Agisoft and PIX4D. While UAV photogrammetry provides a low-cost method for creating very high resolution datasets of small areas, specialized workstations and accurate ground checks are needed for processing images and assessing accuracy.
Unmanned Aerial Systems (UAS) Data Quality and Accuracy RealitiesUAS Colorado
Technical presentation from Matt Bethel, Director of Technology for the Geomatics division of Merrick & Company for the April Rocky Mountain UAS Professionals Meetup group. This talk focused on realistic vertical accuracies that can be derived from unmanned aircraft systems (UAS) using photogrammetric (imagery) techniques.
Technological advances have created efficiencies in both land and topographical surveying. Total stations, satellite positioning systems, GIS software and 3D scanners have advanced the capabilities of surveying. Municipalities benefit from these advances with reduction in staffing needs; creation of safer and quicker processes; and production of more precise work.
Modern surveying methods and instrumentsATHIRA B K
EDM uses modulated microwave or infrared signals to measure distance. The distance is determined by emitting multiple frequencies and calculating the number of wavelengths to the target. Total stations integrate EDM, digital data storage, and angle measurement to provide position coordinates of points. GPS uses satellite triangulation to determine 3D position within meters by measuring signals from four satellites. It has made surveying faster and more efficient but relies on clear satellite signals.
This application, installed in a pocket PC, allows the user to survey and stake out topographical data using a wide range of total stations, connected through a standard cable or through wireless Bluetooth technology. In motorised stations, the software will automatically direct the device to the desired location. The program provides numerous options and may be used for traditional mapping or surveying, and for projects involving linear works.
Mapping From Unmanned Aircraft System (UAV)Nasr Khashoggi
The document provides an agenda and summaries of presentations given at a UAV workshop. The agenda includes introductions to general presentations on GTT and GATEWING UAV systems, as well as a break and a presentation on using the GATEWING X100 for work. The Gatewing presentation summarizes the company's products and services, including its X100 UAV used for aerial imaging, image processing software, and data products like orthophotos and digital surface models created from UAV images.
Total station is a modern surveying instrument that combines an electronic theodolite and electronic distance meter. It allows the user to determine coordinates of points by measuring horizontal and vertical angles and slope distances to a reflector target simultaneously. The total station records measurements directly into its internal microprocessor, allowing precise data collection and processing without manual calculations. It has made surveying work faster, more accurate and less tedious compared to traditional instruments.
This document discusses modern surveying techniques and technologies. It begins by defining surveying and its objectives such as collecting field data and preparing maps. It then describes several key pieces of modern surveying equipment - digital levels, electro-magnetic distance measurement instruments (EDMI), total stations, and remote sensing. For each, it provides details on how they work, their features and applications. Remote sensing in particular discusses how satellite imagery can support disaster management activities such as mitigation, preparedness, response and recovery for cyclones, earthquakes, floods and other hazards.
The 2016 Remote Sensing Field camp will take the form of two projects.
A low tech, low cost aerial photography project using visible spectrum UAV/Ultralight Aircraft mounted cameras as the sensor to demonstrate that relatively low tech, low cost solutions can achieve surprisingly good results when compared to more commercial systems.
A more high tech, high cost terrestrial LiDAR collect of a building or structure of historical or architectural significance.
The scope of a project will influence all other aspects of the project, including its cost, timing, quality and risk.
This document provides information about GPS (Global Positioning System) and planimeters. It describes the three main parts of GPS as satellites, receivers, and software. It explains how GPS works by using signals from satellites to calculate a receiver's distance and position on Earth. Examples of GPS applications include navigation, agriculture, surveying, and more. The document also gives an overview of how planimeters can be used to accurately measure the area of any shape on a plane or map. It describes the two main types of planimeters as polar and roller planimeters.
What is a Total Station?
Capability of a Total Station
Important Operations of Total Station
Uses of Total Station
Advantages of Using Total Stations
Applications
Electronic distance measurement (EDM) instruments use infrared, laser, or microwave signals to measure distances. Total stations integrate EDM, angle measurement, and data processing capabilities. They can determine coordinates, elevations, distances, and areas with accuracy from 0.5 to 5 seconds for angles and 1.6 to 3 km for distances. Total stations are used for tasks like point location, trigonometric leveling, resection, layout, and remote elevation measurement through the use of prisms and various field techniques.
This document provides an overview of electronic distance measuring (EDM) devices and total stations used for surveying. It discusses the history and evolution of surveying techniques from manual methods to modern EDMs and total stations. Key points covered include:
- How total stations integrate an electronic theodolite and EDM to measure angles and distances, then use trigonometry to calculate coordinates.
- Features of Pentax total stations like automatic environmental sensing, auto focusing, and narrow visible beams that improve accuracy and efficiency.
- Software tools like Power Topolite, PSF, and Pythagoras that support data collection, calculations, stakeout, and CAD functions on Pentax total stations.
Surveying techniques have a long history dating back to ancient Egypt in 3000 BC. Precise surveying was important for projects like the Great Pyramids of Giza. In later centuries, surveying was critical for territorial expansion in countries like India and America. Modern surveying methods increasingly utilize electronic devices like total stations, GPS, mobile mapping, and airborne laser scanning to gather precise geographic data.
This document provides instructions on using the programs and functions of a total station for remote elevation measurement, missing line measurement, area calculation, and data collection. It describes procedures for using the total station to remotely measure elevations when direct prism placement is not possible. It also outlines the two modes for missing line measurement to obtain distance, slope distance, elevation, and horizontal angle between two target prisms. The document details procedures for calculating areas of closed figures using coordinate data or direct measurement. It provides guidance on field work including data collection in distance, angle, and coordinate modes as well as instructions for instrument and operation maintenance.
Experience on using total station surveying for mapping and contouringIAEME Publication
This document describes the experience of using a total station to map and create contours of a large university campus. Key points:
- A total station was used to efficiently collect planimetric and elevation data across the 1.5km x 2.5km campus to update existing inaccurate maps.
- Over 700-1000 points per day could be collected using one or more prisms simultaneously. Precise procedures were developed to quickly collect data for both mapping and contouring.
- In the office, data files from each instrument setup were processed individually in Excel and drawn in AutoCAD. Files were then combined and aligned to create a unified campus map and contour lines.
This document summarizes various modern surveying equipment used for mapping and construction projects, including:
- Electronic distance measurement (EDM) devices and total stations that integrate EDM to measure distances electronically.
- Automatic and digital levels used to measure elevations and slopes accurately and efficiently.
- Global positioning systems (GPS) that use satellites to determine precise locations on Earth.
- Key principles, components, operations, and uses of total stations are described, which integrate distance measurement, angle measurement, and data recording into one portable instrument.
Poster Presentation "Generation of High Resolution DSM Usin UAV Images"Nepal Flying Labs
UAV images were used to generate high resolution digital surface models (DSMs). PIX4D software produced the most accurate DSMs, with errors less than 2 cm compared to ground control points. For areas with repetitive patterns or vegetation, classical photogrammetry algorithms in LPS performed poorer than computer vision approaches in Agisoft and PIX4D. While UAV photogrammetry provides a low-cost method for creating very high resolution datasets of small areas, specialized workstations and accurate ground checks are needed for processing images and assessing accuracy.
Unmanned Aerial Systems (UAS) Data Quality and Accuracy RealitiesUAS Colorado
Technical presentation from Matt Bethel, Director of Technology for the Geomatics division of Merrick & Company for the April Rocky Mountain UAS Professionals Meetup group. This talk focused on realistic vertical accuracies that can be derived from unmanned aircraft systems (UAS) using photogrammetric (imagery) techniques.
Con il presente elaborato voglio dimostrare come le discipline che fanno parte della Geomatica consentono di reperire e gestire dati durante una situazione d’emergenza, realizzando un prodotto cartografico in tempi brevi, utilizzabile da utenti esperti come aiuti umanitari e protezione civile ma anche da persone non professioniste.
The document summarizes the work done in Project SLOPE for system integration (WP6). It discusses the three main integration tasks: 1) integrating forest inventory and harvesting systems, 2) integrating forest management systems, and 3) validating the integrated system. Each integration task involved defining components, timelines, and test scenarios. Functional and non-functional requirements were tested across nine software versions, with over 90% of tests passed. The work package developed an integrated SLOPE system ready for pilot demonstrations and field testing.
IRJET- Proposed Design for 3D Map Generation using UAVIRJET Journal
The document proposes a design for 3D map generation using an unmanned aerial vehicle (UAV). Images collected by the UAV would undergo processing using techniques like photogrammetry and videogrammetry to generate point clouds and convert the 2D images into 3D models. Pix4Dmapper software would be used to analyze control points within images, overlap similar images, filter out noise, and generate the 3D point cloud which forms the basic building block for 3D map creation. The vSLAM algorithm would also be used to determine the sensor orientation and reconstruct the environment. The proposed system would use tools like the Tower app and databases like MySQL and HBase to control the UAV, process and store the image data,
Accuracy checks in the production of orthophotosAlexander Decker
This document summarizes the process of creating an orthophoto and factors that affect its geometric accuracy. It describes preparing input data like aerial photos, camera calibration, and ground control points. It then details the steps of interior and exterior orientation, automatic DTM generation with editing, and orthophoto generation. Accuracy is expected to be within 1 meter horizontally and 0.4 meters vertically based on the input data and DTM error. Planimetric accuracy of digitized features from the orthophoto will also depend on these geometric accuracy factors.
Facet technology 4DFlash(tm) vision sensor for vehiclesJohn Dolejsi
This document discusses Facet Technology, a provider of machine vision processing hardware, software, and intellectual property. It describes Facet's 4DFlash technology, a vision sensor that integrates LiDAR, camera, and radar data from a single sensor. Key advantages of 4DFlash over other vision sensors include higher resolution (5.2 MP), longer range (200m), superior performance in adverse weather, and lower overall system cost. The document promotes potential partnerships for Facet to license its sensor technology and intellectual property to automotive companies.
Drone photography was used to map 116 acres of land in Manipur, India for development of Manipur Technical University. Over 4000 aerial images were taken with a DJI Phantom 4 drone and stitched together to create a high resolution digital elevation model and orthophoto of the site. This accurate 3D model and aerial imagery allowed planners to easily demarcate the plot boundaries, calculate elevations, and estimate development costs. The drone survey was much faster and more precise than relying on outdated paper maps and low resolution satellite imagery.
Aerial Services, Inc. (ASI) is an integrated team of professionals providing premier services and products to government, utilities, engineers, and other geospatial customers. Based in the Iowa heartland for over 40 years, Aerial Services’ Midwestern work ethic, cutting-edge technology, and experienced staff combine to harness the power of geographic information and provide solutions you need.
The Innovative Video Vision Machine DPS200-Video is a powerful and easy-to-use video vision machine for producing fully dimensioned drawings of measured parts within minutes. It features video edge detection to capture hundreds of data points instantly, profile scanning to automatically trace undefined parts, and SPC analysis including control charts. Dimensioned part views show in/out of tolerance dimensions in green/red.
DSM Generation Using High Resolution UAV ImagesBiplov Bhandari
This document outlines a project to create a digital surface model (DSM) using images acquired from an unmanned aerial vehicle (UAV). The project aims to develop a workflow for processing UAV images and generate a high-resolution DSM of the study area. The methodology involves collecting UAV images and ground control points, georeferencing the images, generating a dense point cloud through image matching, and creating the DSM. The accuracy of the DSM will then be assessed by comparing elevations to ground measurements. The results are expected to provide a georeferenced image processing workflow and a detailed DSM of the site.
presentation about 2 emerging standards activities that I started and led in MPeG, point cloud compression on a new image and video format, and NBMP for media delivery in 5G networks. Presented at Philips R&D in Eindhoven the Netherlands
IRJET - Surveying using Drones and Providing Results by using Photogrammm...IRJET Journal
This document discusses using drones and photogrammetry software to survey Sona College campus. It involves four phases: preliminary study, data collection via a drone, data processing using software, and analysis. The drone was used to capture images of the entire campus from varying altitudes. Photogrammetry software was then used to process the images and produce an orthomosaic of the campus along with accuracy assessments and calculations of areas and distances. The results provided reliable surveying data of the campus with accuracy meeting engineering survey standards.
IRJET- Surveying using Drones and Providing Results by using Photogrammme...IRJET Journal
This document discusses using drones and photogrammetry software to survey Sona College campus. It involves four phases: preliminary study, data collection via a drone, data processing using software, and analysis. The drone was used to capture images of the entire campus from varying altitudes. Photogrammetry software was then used to process the images and produce an orthomosaic and 3D model of the campus. Metrics like areas of buildings, fields, and distances were extracted from the model and accurate to engineering survey standards. The study found drones can efficiently and cost-effectively provide surveying data for engineering projects like campus mapping.
Critical Infrastructure Monitoring Using UAV Imageryaditess
The use of two rapidly evolving approaches, the Unmanned Aerial Vehicles (UAVs) and Dense Image Matching (DIM) techniques is an attractive solution to extract high quality photogrammetric products like 3D point clouds and orthoimages.
Data Usability Assessment for Remote Sensing Data: Accuracy of Interactive Da...Beniamino Murgante
The document discusses improving spatial data quality through data conflation and assessing the accuracy of interactive data quality interpretation for remote sensing data. It describes using data usability as a new quality measure that is interactively interpreted based on technical errors, unusable image segments, clouds, and other factors. The document also outlines equations and graphs for assessing data quality, the evaluation of subjectivity, comparing interpretations to standard deviations and metadata, and generating quick-look products with cloud masks for monitoring processing status.
This document summarizes the process of drone surveys. It discusses (1) how drone surveys capture aerial data using cameras and sensors to create models, maps, and analyses; (2) the typical drone survey process, including approvals, flight planning, ground control, processing data, and creating reports; and (3) how drones provide benefits over traditional surveys by being faster, safer, able to access remote areas, and capturing more accurate and precise data.
This document discusses progress on Task 2.1 of Project SLOPE. It outlines the participants in the task and their roles in collecting and analyzing forest information using remote sensing. Work completed so far includes acquiring satellite imagery of test sites, conducting trials combining aerial imagery and laser scanning in Ireland, and identifying additional test sites in Trento and Austria. The next steps are to get permission to fly in Italy, test equipment at new sites, finalize the methodology, and disseminate results.
5.3 Produits & Services en Observation de la Terre au service de la coopérati...grisicap
The document discusses how the Galileo satellite navigation system can help with earth observation products and services. It describes Spot Image's mission to provide geographic information solutions using satellite imagery. Galileo could improve the accuracy of satellite imagery and derived maps by providing precise positioning without ground control points. This would increase the value of earth observation data and enable new location-based services.
The document provides an overview and progress report on NextGen, the FAA's modernization of the national airspace system. It discusses how NextGen is transitioning from a ground-based radar system to a satellite-based surveillance system to make air travel safer, more efficient, and less impactful on the environment. It outlines some of the key NextGen programs being implemented, such as Automatic Dependent Surveillance-Broadcast, Performance Based Navigation, and System Wide Information Management. Charts show the budget profile for NextGen and planned timelines for major program deliverables through 2015.
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Presented two use cases of the UAV.
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Low power architecture of logic gates using adiabatic techniques
Generation of High Resolution DSM using UAV images
1. Final Presentation On
Generation of High resolution DSM using UAV
Images
8/4/20141
Project Supervisor
Uma Shankar Pandey
Co-Supervisor
Asst. Prof. Nawaraj Shrestha
Group Members
Biplov Bhandari
Upendra Oli
Niroj Panta
Uttam Pudasaini
5. Trimble UX5 Imaging Rover
with Sony Nex-5R Digital
Camera
Total area covered by the sand mine :0.0395 sq.km.
Average terrain height: 134.1718 m 5 8/4/2014
15. Software Number of tie points
PIX4D 321527
AgiSoft PhotoScan 76682
Fig: Tie Points connecting same areas on
overlapping portion of two images during
image matching
Table: Tie point generation using Forstner interest operator
in Classical photogrammetry
Table: Tie point generation using SIFT operator
in Computer Vision
Parameters Matching
Success
Total Number
of Tie Points
Initial Accuracy = 5%
Correlation Coefficient =
Window search size = 10
Point per Image = 50
32.69 % 234
Initial Accuracy = 25%
Correlation Coefficient =
Window search size = 15
Point per Image = 200
86.35 % 1128
8/4/201415
16. Software LPS AgiSoft
PhotoSca
n
PIX4D
Accuracy of
BBA(pixel)
1.5817 0.672 0.335
Following parameters were adjusted during this phase:
Position and orientation of each image as they existed at the time of
photography.
Ground coordinates of every tie points measured on the overlap areas of
multiple images.
Errors associated with the GCPs ,check points and all other image parameters
Sparse point cloud generated using computer vision algorithms helps in the
accurate estimation of image parameters thus increasing the accuracy of BBA
8/4/201416
17. Results from
LPS
Results from
AgiSoft
Results from
PIX4D
Point No Error in X
(cm)
Error in Y
(cm)
Error in Z
(cm) Type
2008 1.94 -7.69 0.85 Check Points
2005 -11.91 9.03 4.81 Check Points
2012 27.38 9.47 6.02 Check Points
RMSE
17.27 8.76 4.47
Point No Error in X
(cm)
Error in Y
(cm)
Error in Z
(cm) Type
2008 3.63 -2.02 -6.03 Check Points
2005 0.44 -0.27 -0.93 Check Points
2012 -0.58 0.46 5.80 Check Points
RMSE 2.13 1.21 4.86
Point No Error in X
(cm)
Error in Y
(cm)
Error in Z
(cm) Type
2008 -2.23 1.72 0.81 Check Points
2005 -0.85 -2.21 -2.95 Check Points
2012 0.42 -3.24 4.17 Check Points
RMSE 1.4 2.47 2.98
8/4/201417
18. Imes
DSM FROM LPS DSM FROM AgiSoft DSM FROM PIX4D
Classical approach Computer Vision technique
8/4/201418
19. n
ZZ
RMSE
n
i iDSMiCP
1
2
,, )(
where ZCP is elevation of check
points and ZDSM is the elevation
of same points from output DSM
A statistical approach to compute the accuracy
Point
No
Elevation (m) Elevation Difference (cm)
Original
(O)
DSM
LPS
(a)
DSM
AP
(b)
DSM
PIX4D
(c)
O-a O-b O-c
2003 136.173 136.278 136.116 136.201 -10.54 5.66 -2.84
2004 128.362 128.392 128.422 128.375 -3.04 -6.04 -1.34
2006 132.402 132.262 132.381 132.382 13.960 2.06 1.96
2007 127.585 127.649 127.653 127.571 -6.44 -6.84 1.36
2010 131.953 132.052 131.941 131.962 -9.94- 1.16 -0.94
RMSE(cm) 9.546 4.917 1.813
Mean=
8.783
Mean=
4.348
Mean=
1.688
8/4/201419
20. Software
AgiSoft
Photo-
scan
PIX4D
LPS
AgiSoft
Photo-
scan
PIX4D
Actual Image Tie Points DSM
LPS
Surface 1: Areas
covered by trees and
similar textured Roads
Surface 2:
Heterogeneous area
with different objects
and terrain structure
Classical Photogrammetric
image matching algorithms
fails for areas with
homogenous and repetitive
pattern. Large spikes on
output DSM from LPS
illustrates this statement
For mixed topography, all
the algorithms works fine
PIX4D provides the best result in
all cases.
Poor results at area
covered with trees and
vegetation
8/4/201420
21. LPS-PIX4D LPS-AgiSoft PIX4D-Agisoft
Difference in DSM from LPS to other software has a large value
Computer Vision provides better results as PIX4D-Agisoft has vey low
difference
Large differences in cases of areas covered with trees and vegetation 8/4/201421
22. Dependency on data provided by external source led to
data insufficiency and data inconsistency
Editing of point cloud couldn’t be done because of lack of sophisticated
hardware
Use of commercial software packages allowed limited changes in the
input parameters
No further techniques (eg: use of geometrical properties of objects)
have been used to enhance the output DSM quality
8/4/201424
27. Particulars
Aerial Photogrammetry UAV Photogrammetry
Data Acquisition Manual/Assisted Assisted/Manual/ Automatic
Aerial Vehicle Highly stable specially
designed aircrafts
Small aerial Vehicles with certain
payload capacity
GPS/INS Configurations cm-dm level accuracy cm-10 m
Image Resolution cm-m mm-m
Ground Coverage Km2 m2-km2
Cameras Well calibrated cameras
especially designed for
photogrammetric applications
Can work with normal off-shelf
digital cameras
Fudicial Marks Present Absent
Flying Height 100 m-10 km m-km
(not more than 1 km)
Data Processing Workflows Standard Photogrammetric
Workflow
No standard workflows
Salient Feature Better control over the output
image quality
High temporal accuracy with real
time applications
ComparisonbetweenAerialandUAVPhotogrammetry
27
28.
29.
30. The Collinearity condition specifies that
Exposure station, ground point, and its corresponding image point
location must all lie along a straight line, thereby being collinear.
Two equations comprise the Collinearity condition:
Bundle block adjustment uses the
COLLINEARITY CONDITION
as the basis for formulating the relationship
between image space and ground space.