摘要
数字高程模型(DEM)是一定区域范围内规则格网点的平面坐标及其高程的数据集或者是经、纬度和海拔高度的数据集。DEM用途广泛,数字地球、数字城市、数字区调等工作以及虚拟现实三维可视化都需要高精度的DEM支撑。本文分析了DEM的构建方法及利用地形图生成的DEM的技术路线和数据转换的问题,论述了DEM在数字区调中的应用,实践证明,该技术在一定程度上解决了高原区调面临的难题,为地质工作提供了一种新途径。
DEM （Digital Elevation Model） is a data set of plane coordinate or longitude, latitude, and elevation of the regular square grid points in some region, It is applied widely, Digital Earth, Digital City, Digital Regional Geological Survey and 3D virtual images are all based on high precision DEM. This paper analyses the constructional methods of DEM, the key technology and conversion of data of distilling DEM iwth relief map, and discusses its application in Digital Geological Survey. It is proved that this technique can resolve the difference in Altiplano Regional Geological Survey and give a new method for geological work.
出处
《工程勘察》
CSCD
北大核心
2005年第5期61-64,共4页
Geotechnical Investigation & Surveying
关键词
数字高程模型
DEM
数据转换
Digital Elevation Model
DEM
conversion of data
