application of gis

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application of gis

  1. 1. APPLICATION OF GIS IN ENVIRONMENTAL STUDIES 1 PRESENTED BY E.LAKSHMI 131867
  2. 2. GIS 2  GIS is a powerful software technology that allows a virtually unlimited amount of information to be linked to a geographic location.  A system for capturing, storing, checking, manipulating, analyzing and displaying data which are spatially referenced to earth
  3. 3. GIS IN ENVIRONMENT STUDIES 3  GIS is a powerful tool for environmental data analysis and planning.  A digital basemap can be overlaid with data or other layers of information onto a map in order to view spatial information and relationships.
  4. 4. CONTD.. 4  GIS can provide a quick, comparative view of hazards (highly prone areas) and risks areas of high risk which may occur) and areas to be safeguarded.  GIS supports activities in environmental assessment, monitoring, and mitigation and can also be used for generating Environmental models.
  5. 5. APPLICATIONS 5
  6. 6. GIS IN THE FIELD 6  The GIS tool is flexible enough to work in the field to give the exact location of devastation and amount of devastation.  Combining GIS with mobile technologies, such as GPS and automated vehicle location systems, provides environmental agencies with mobile solutions that save time, focus resources, and capture accurate data.
  7. 7. CASE STUDY 7 A GIS technology and method to assess environmental problems from land use/cover changes: Conakry, Coyah and Dubreka region case study.
  8. 8. INTRODUCTION 8  It sometimes seems inevitable that human and natural factors can cause landscape changes.  There is an increasing need for standardized land use and land cover information especially in critical areas of environmental concern like urban extension and forest clearing.
  9. 9. CONTD.. 9  The objective of this study is to evaluate the land use/cover changes in the study area, and then propose some solutions.  The GIS data used in the study will be important reference information.
  10. 10. STUDY AREA 10
  11. 11. METHODOLOGY 11 1. Land use/cover methods  Land use/cover classification (water, wetland, forest, grassland, agriculture and housing);  Population increase or decrease model;  Overlay method. 2. Data source and processing: (data for information)  Digitizing and interpreting two maps of two different periods:  Topographic map (past) – scale: 1/200 000.  ETM+ image (present) – resolution: 30 · 30.
  12. 12. Pattern of land use/cover in past period map. 12
  13. 13. Pattern of land use/cover in present period map. 13
  14. 14. CONCLUSION 14  The results of this research show a degraded and disturbed land use/cover pattern in this region of study, with the change or disappearance of certain land cover elements.  In the final analysis, this research shows that detection and evaluation of the causes and consequences of land use/cover change may lead to a possible proposal for a solution, one based on the geographic information system (GIS).

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