A Method of Generating Three-Dimensional Terrain Based on Digital Geographical Topographic Map

Abstract

At present there are diverse algorithms in generating 3d terrain,to further improve the efficiency of the algorithms and fidelity of the 3d terrain,a new method generating 3d terrain by digital geographical topographic map was put forward.First extract the contour lines from the map and thin the contour lines by a improved thinning algorithm based on mathematical morphology[1].In the process of interpolation,the digital elevation map of terrain can be got by interpolation in vertical and horizontal directions,and the method of intra-interpolation and extra-interpolation according to the distribution of contour lines was also used.The terrain got by this method can reflect the details and the tendency of the terrain.The digital geographical topographic map on the network can reflect the change of the terrain timely because of its high updating speed.This method has great practical value