从规则高程格网中自动提取等高线是地理信息系统以及计算机制图的基本功能。
The extraction of contour lines from Grid DEM is a primary function in computer-aided cartography and GIS.
在遥感与GIS技术的基础上，应用数字高程模型(DEM)生成的格网模型进行洪水的淹没分析。
Based on remote sensing technology the GIS grid model generated by digital elevation model (DEM) is utilized to analyze the flood submergence.
论述了一种基于大规模格网数据或离散高程点动态构建多分辨率地形模型的算法。
This paper presents a dynamic construction algorithm for the multi-resolution terrain model based on the large scale GRID data or discrete elevation data.
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