Generation of Statewide DEMs and Orthoimages - Guidelines and Methodology (original) (raw)
2014, Kartografija i geoinformacije (Cartography and Geoinformation)
Cartosat-1 is a global high-resolution stereoscopic imaging mission to support enhanced applications in several areas of terrain mapping, natural resources management, disaster management, infrastructure and develop0ment planning. A collaborative project of generating state-wide Digital Elevation Model (DEM) and a mosaic of Ortho-images for all the states and union territories in India has been completed within the project Space-Based Information Support for Decentralized Planning (SIS-DP) using photogrammetric techniques with Cartosat-1 stereo data. Approximately 11000 stereo pairs of Cartosat-1 data were used in this process. Photogrammetric block for each state was processed using existing reference tiles and accordingly, orthoimages were generated. The paper outlines the methodology for generating state-wide Digital Elevation Models (DEM) and orthoimages. Guidelines that govern the quality of the output are discussed. Dissemination mechanism via a publically accessible web platform is described.
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