Geology and geomorphological features in Thanjavur district, Tamilnadu using spatial technology

Geology and geomorphological map is a very effective tool in management of natural resources and helps in various types of planning and developmental activities. In the present study, geomorphological map for the Thanjavur district was prepared using aerial photographs on 1:50,000 scale, satellite imagery of IRS-ID LISS III false colour composites, generated from bands, 2, 3 and 4 an SOl topographic sheets validated ground truth. Since large part of the study area is inaccessible, remotely sensed data have played an important role in detailed mapping. The study area is mainly underlain by, Precambrian rocks. Quarternary and recent formations are confined mainly to the sedimentary area. The criteria adopted for the identification and grouping of landforms of specific genetic type are the overall underlying geology, geomorphology formation processes, and association of forms. The landform units, each having its own features, were identified under the satellite imagery.