Delaunay Triangulation Algorithm Realization & Application
Abstract
Digital Elevation Model(DEM) is a digital modeling process which aims at terrain and physiognomy. Irregular triangulation TIN is the best model when DEM data are stored and expressed. Besides reducing the redundancy of the data caused by regular raster model, it also presents the method purely based on contour lines in calculate efficiency. So a well developed arithmetic can show and simulated 3-Dimension information of terrain and geomorphology more quickly and vividly. Among all the available ones, Dlaunay triangulation is the best to simulate the terrain. And so it is used to create TIN usually. According to the analyse rule, the edges were used as the base when going forward ,other than Vononoi figure as the base. Consequently, the speed of constructing Delaunay triangle was greatly improved . The result of simulating shows that the efficiency of mended algorithm is evidently enhanced.
