Generation of Digital Elevation Map for Steep Terrain Region Using Landsat-7 ETM+ Imagery

Generation of Digital Elevation Map (DEM) is a challenging task, because it is an extraction of 3-dimensional information from 2-dimensional image. In the proposed method, we have generated DEM for steep terrain region using Landsat 7 ETM+ imagery. The Rational Polynomial Coefficients (RPCs) are used to generate epipolar line, epipolar resampling generates template image. Normalized Correlation Coefficient (NCC) is used as template matching technique to match template image with target image. The RMSE at elevation points are calculated against Ground Control Points (GCPs). The proposed approach is a replacement of physical sensor model which are used to generate DEM.