Digital Elevation Modeling(DEM) Based on Hierarchical Subdivision of the Triangular Meshes on Ellipsoidal Surface 基于椭球面三角格网的数字高程建模(DEM)
In the aspect of geological and mining, 3D data modeling is widely used in DEM ( Digital Elevation Model ), mine surface modeling, and 3D open-pit modeling. 在地质采矿方面,三维数据建模广泛应用于数字高程地表建模、矿体表面建模,以及三维露天采坑建模等领域。
A Review of the Digital Elevation Model Extraction and Digital Hydrological Modeling 数字高程模型信息提取与数字水文模型研究进展
Digital elevation model ( DEM ) is the basis for catchment hydrological modeling which utilizing geographical information system ( GIS ). 数值地形图(DEM)是利用地理信息系统(GIS)进行流域水文模拟的基础,其精度直接影响模拟结果。
The automated extraction of the digital river network from digital elevation models is very important for the researches on both the river network structure analysis and the distributed watershed hydrological modeling. 数字河网自动提取是流域水系网络结构研究、分布式流域水文模拟中的重要内容。