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1 DEM简介数字高程模型DEM(Digital Elevtion Model)是现实世界中地面、山川、河流起伏等在计算机中的数字化表达。它作为一种新兴的高科技测绘技术,在计算机中能直观地反映现实的地形、地貌情况;还可以用立体格网方式表达;也可以查询点位的坐标、量测土方量、生成不同坡度图等。因而DEM技术无论在军队的高级指挥部,还是在各级各类政府部门、行政机关(如、水利防汛部门、城建规划部门、地质部门等等)以及各种国家设计建设中,都将发挥十分重要的作用。
1 DEM Introduction Digital elevation model DEM (Digital Elevtion Model) is the real world digital representation of the ground, mountains and rivers in the computer. As a new high-tech mapping technology, it can directly reflect the real topography and topography in the computer. It can also be expressed in a three-dimensional grid. It can also query the coordinates of the points, measure the amount of earthwork, and generate different grades Figure and so on. Therefore, DEM technology will play a very important role both in the advanced command of the army and in all kinds of government departments and administrative agencies at all levels (eg, flood control and flood control department, urban construction planning department, geological department, etc.) and various national design and construction Important role.