This document discusses the application of GIS in environmental studies. GIS allows for spatial data analysis and overlay of environmental data on digital maps. It can be used to identify hazards, risks, and areas requiring protection. GIS supports environmental assessment, monitoring, and mitigation activities. Field studies can utilize GIS with GPS to accurately map environmental damage. As a case study, the document examines land use/cover changes over time in three regions of Guinea, Africa using GIS analysis of maps and satellite images from different periods. It finds degradation and disturbances, and concludes GIS can help detect changes and potentially propose solutions.

1. APPLICATION OF GIS IN
ENVIRONMENTAL STUDIES
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PRESENTED BY
E.LAKSHMI
131867

2. GIS
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 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. GIS IN ENVIRONMENT STUDIES
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 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. CONTD..
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 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. APPLICATIONS
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6. GIS IN THE FIELD
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 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. CASE STUDY
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A GIS technology and method to assess
environmental
problems
from
land
use/cover changes: Conakry, Coyah and
Dubreka region case study.

8. INTRODUCTION
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 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. CONTD..
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 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. STUDY AREA
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11. METHODOLOGY
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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. Pattern of land use/cover in past period map.
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13. Pattern of land use/cover in present period map.
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14. CONCLUSION
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 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).