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GIS and Remote Sensing for Natural Resource Survey and Management
Geology
The geo-referenced satellite digital data was used to carry out ‘on screen’ vectorization of geological parameters. Basically three vector layers were generated in. The first vector consists of geological structure attributes with length based classification second vector consists of geomorphic attributes and the third vector consists of broad litho logical map. In the case of image processing, spatial and spectral domain enhancement was carried out using ENVI software. The following steps were involved:-
- Satellite data has been be geo-referenced with the available map sheets.
- LISS-3 / Liss-4 and AWIFS data were be acquired for the entire study area
- LISS-3 was used for regional assessments and LISS-4 data was used for detail assessments.
- These data sets were co registered with other collateral data sets by taking common Ground Control points (GCP).
- The satellite data was enhanced both in spectral and spatial domain.
- A optimised image was generated for visual / Onscreen interpretation.
- The existing geological map was not available for the area and hence using geomorphic analysis, field and published literature a broad level lithological map was prepared.
- The geological structure map was prepared with mainly on type of lineament with emphasis on length, Faults and thrusts
- The geomorphological map was prepared with emphasize on genetic classification of landforms. The major group are coastal landforms, aeolian landforms, and structural landforms.
- A pre-field map was prepared using satellite data
- Ground validation was carried out with emphasis on selective ground checks
- The ground observation was incorporated at appropriate places to finalize post field map
- All the three themes have been integrated in GIS environment to generate hydro-geomorphology map.
Conclusion
The generated theme can be implemented for further planning of the urban and rural area .The action plan report can be created using the Geodata database and total decision support system can be developed to depict location and type of action / control measures recommended for sustainable development plan of Natural Resource. Zonal and Community wise Soil resource development plan, Water resource development plan, Vegetation resource development plan, Land use and Land cover plan can be incorporated using statistics of the personal Geodatase of the respective Theme.
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