By means of GIS method, the digital elevation model(DEM)is established, the subcatchment boundaries are studied.

利用 GIS 方法建立了数字高程模型（DEM），研究了子汇水面积的边界。

youdao

For example, Digital Elevation Model (DEM) data points are equally arranged in a grid pattern.

例如，数字高程模型(Digital Elevation Model, DEM)数据点在网格图形中均匀排列。

youdao

Digital elevation model (DEM) is the fundamental infrastructure of geographical information systems and has wide applications in both military and civil areas.

数字高程模型(dem)是重要的基础地理信息数据，在军事和民用领域有着重要的应用价值。

youdao

This digital elevation model (DEM) will be put to myriad uses - everything from improving the safety of aircraft navigation to understanding better which areas of ground are most at risk during a flood.

BBC: German radar satellites fly tight space waltz