1 GENERATION OF CARTOGRAPHIC QUALITY BASE MAPS USING CARTOSAT-1 STEREO IMAGERY IN CONJUNCTION WITH DGPS MEASUREMENTS

High resolution CARTOSAT-1 satellite with its along track stereo capability has opened a number of applications. With fore and aft images looking at +26 ° and-5 ° respectively, the satellite is looking the same terrain forming a stereo pair having spatial resolution 2.5 m and a temporal resolution of, between the pairs, less than a minute. One of the application thought of is the cartographic quality base map generation and its validation. A base map on desired scales is a prerequisite of most of the studies which aims at creation of data base required for Natural resources management, development planning, facility management and infrastructure development Traditionally, these base maps are prepared by surveying. However, during the last three decades, satellite remote sensing has revolutionalized the natural resources survey and mapping. In the present study, Cartographic quality Base maps were prepared for two areas using high resolution CARTOSAT-1 data. The base features were extracted from the ortho images generated using satellite photogrammetric processing using Ground Control Points (GCPs) derived from differential GPS survey. The accuracy of the base maps were assessed by comparing the coordinates, scale, azimuth, area and perimeter with those derived using DGPS survey