This paper studies the application of digital elevation model (DEM) to the design of the surface drainage ditch system.

研究数字高程模型(DEM)在滑坡地表排水辅助设计中的应用。

youdao

Terrain fidelity of digital elevation model (DEM) can be enhanced by integrating terrain character points and terrain lines in the three dimensional model.

采用了地性特征点和地性线参与三维建模的方法，提高了数字高程模型DEM的地形逼真度。

youdao

This paper discusses the methods of automatic extraction of digital elevation model (DEM) from remote sensing image. A system of scheme is established to extract DEM from SPOT image.

本文研究了利用航天遥感影像自动提取数字高程模型（DEM）的方法技术，建立了一整套利用SPOT影像提取DEM的方案。

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