Extraction of terrain parameters from IRS-1C PAN stereo data using photogrammetric techniques

摘要

Digital Elevation Model (DEM) is used for extraction of terrain parameters such as elevation, slope, aspect, contour, drainage pattern, etc. These parameters are often required in preparation of development and conservation plan for natural resources, infrastructure development town planning, etc. Indian Remote Sensing Satellites IRS-1C/1D carry on-board push broom Linear CCD PAN camera, providing high resolution (5.8 m) stereo imagery of the earth's surface. DEM has been derived from PAN stereo pair of IRS-1C/1D using suitable mathematical models. It has been used to generate contours and extract drainage patterns. DEM generated from stereo data has been validated using ground control points (GCPs) and also by the surface-to-surface comparison method. Evaluation of drainage pattern is carried out by morphometric analysis.