基于地形图数据快速生成大范围DEM的研究与实现

通过等高线回放目视检查方法和不同采样间隔下DEM中误差、地表粗糙度及DEM数据量的对比分析,充分论证了基于地形图数据生成DEM时的合理采样间隔,并以此为基础利用现有1∶50 000地形图数据在ArcGIS中构建模型实现了大范围DEM的快速生成,为广域高精度DEM数据的批量生产提供了一定的实践经验。

Research and Implementation of Rapid Generating Large Range DEM Based on Topographic Map Data

Based on the comparative analysis of contour line playback visual inspection method and error,terrain roughness and DEM data volume of DEM with different sampling interval,adequately demonstrate the reasonable sampling interval when generating DEM based on topographic map data,take this as a basis and utilize the available 1:50 000 topographic map data to establish model and implement the rapid generation of large range DEM and it provides a certain experiences for the mass production of DEM data with high wide-area precision.