Cadastral level resources information system for Neeralipallam(kb3) Watershed in the Nilgiris district, Tamilnadu, South India using Remote Sensing, GPS and GIS.



Data source and methodology
Aerial photographs on 1:8000 scale taken during 1996, IRS IC LISS III, PAN data, the corresponding SOI topographical maps of the area and other collateral data have been used in this study.

The methodology used consists of the following types

  • Ground Control Survey using GPS and generation of orthophotos on 1: 5000 scale, DEM and contour maps at 5m contour interval.


  • Visual Interpretation of Orthophots, Satellite data and preparation of various thematic maps, collection of cadastral maps and bringing it to 1: 5000 scale. Generating digital database from thematic maps and integration and preparing action plans.
Thematic maps
  1. Landuse map


    2. Landuse / Landcover map for the area has been prepared using 1:5000 scale orthophotos and IRS 1C PAN data.

    Following categories of landuse classes were identified.

    • Annual crop


    • Tea/ Coffee


    • Evergreen / Semi evergreen / Shola forest


    • Degraded forest


    • Forest plantation


    • Land with or without scrub


    • Barren rocky / out crops


    • Grass land

  2. Slope map


    3. Slope map was prepared using ArcView 3D Analyst from 5 m interval contours derived by photogrammetry techniques. Originally nine groups were identified and the same were regrouped as given below.

    1. 0 - 10% Nearly level to moderately sloping


    2. 10 - 33% Moderately to steep sloping


    3. > 33% Very Steep sloping

  3. Soil Map


    4. The soil map also has been prepared using the Orthophotos and updated using IRS1-C LISS III satellite data based on the tone, texture and pattern.








    Soil survey method include (i) Identification of kind of Soil (ii) Description of kind of soil (iii) Classification of the same (iv) mapping their extent and distribution on the standard scale base map.
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