A simple and practical digital topographic model of the band-formed grid method has been chosen. 本方法选用了简单实用的带状方格网式数字地形模型。
The DEMs based digital terrain analysis approaches are investigated, among which the emphasis is put on the topographic structure extraction based on grid DEMs. 对基于DEM的数字地形分析问题进行研究,其中对基于规则格网DEM的地形结构线的提取问题进行了重点研究。