Application Of3D Digital Topographic Map In Engineering Design

3D digital topographic maps use3D discrete points to express the spatial location andthree-dimensional shape of the surface features and landscapes. It is the demonstration andvisual expression of three-dimensional spatial data based on the abstract symbols, whichexpresses the objective world more completely and accurately. It applied3D modelingtechniques to show the users geospatial phenomenon, which can not only express the planerelations between spatial objects, but also can describe the ground elevation and terrain height,and enhance spatial cognition and spatial analysis capability of the digital map. This paperstudies the principle of the digital terrain model (DTM),and analyzes developed created DEMrelated software, further discusses the study in engineering applications and promotion, thentakes field leveling and open-pit mining of coal in Yangjialing Development Zone forexamples to demonstrate the application functionality and precision error comparativeanalysis of3D digital terrain map in the earthwork volume calculations, the surface areacalculation, the open pit stripping calculation, and other aspects, the conclusion is: reasonablecomputational model should be applied in three-dimensional digital topographic maps duringengineering applications.