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National Mission on Geomorphological and Lineament mapping on 1:50,000 scale using satellite data
Background
The National Geomorphological and Lineament Mapping (NGLM) project on 1:50,000 scale using satellite data followed by limited ground validation was conceived by NNRMS Standing Committee on Geology and Mineral Resources (NNRMS SC-G) in 2004 who recommended Geological Survey of India (GSI) and Indian Space Research Organisation (ISRO) to take up the project jointly. A National Level Legend committee was formulated and a three tier National Level genetic classification scheme (Click here) was prepared which formed the basis of mapping. The first level addresses the genetic aspects of different landforms such as structural origin, denudational origin, fluvial origin etc.; the second level covers the broad geomorphic units such as dissected hills and valleys, plains, plateaus etc; and the third level covers the individual landforms to be represented at the mapping scale. At first, five different geomorphic provinces were taken up for pilot study : (i) Tiruchirapalli district (Tamil Nadu), (ii) Hoshangabad district (Madhya Pradesh), (iii) Mahanadi Delta (Orissa), (iv) Jalor district (Rajasthan), and (v) Kullu district (Himachal Pradesh). Based on the success of the pilot projects the NGLM project was initiated in 2009.

Tiruchirapalli (Inselberg)


Mahanadi delta (Spit & bar)


Hoshangabad (Strike ridge)


Kulu (Alluvial fan)


Jalor (Sand dune)

Objectives
  • Mapping of landforms for the entire country on 1:50,000 scale.
  • Mapping of lineaments of tectonic and structural significance and classify them for the entire country on 1:50,000 scale.
Input data used
  • Enhanced IRS P6 LISS-III geocoded image - soft / hard copies from LULC project (two seasons of 2005-2006).
  • Survey of India toposheet on 1: 50,000 scale.
  • Geological and structural maps published by GSI (Geological map of GSI in 1:50k in digital format is the best option as and where available).
  • DEM as and where available.
  • Google earth data.
  • Available geomorphological / lithological maps from RGNDWM / NRIS / IMSD / project Jaladhatri (carried by GSI) or any other resource mapping projects.
  • Field and collateral data.

Interpretation and data capturing from satellite image using NRC_Geom software

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