Study and application of generating 3D relief maps based on contours maps

It was described a interpolation algorithm of DEM based on Vectorized contour lines and the visible technology of terrain surface production by DEM.In the process of creating Digital elevation model,a new method was proposed.It was implemented the structural features of elevation contour images.A rapidly search method in searching contour lines was also given out.The algorithm was used in Overhead Electrical Transmission Line Design System which was showed good performance on both speed and accuracy.