Abstract:

The paper mainly addresses DEM generation and analysis of the Fildes Peninsula using IKONOS stereo pairs.IKONOS uses the Rational Polynomial Camera(RPC) model, also called an Image Geometry Model(IGM),as a substitute of rigid geometrical model based on the collinearity equation.The horizontal and vertical accuracies of generated DEM are mainly dependant on the accuracy of RPC model.By only using RPC model,the positional accuracy and vertical accuracy of reference product suite are 25 m(CE90) and 22 m(LE90) respectively,which can't meet the requirements of high accuracy topographic map.In order to improve the accuracy,the ground control points collected during CHINARE-23,2006/2007,are used to revise the previous RPC model.It reveals that the accuracy of extracted DEM improves apparently,which can meet the requirements of 1∶5000 remote-sensing cartographic map and 1∶10000 topographic map.