However, the features of topographic information of these DEMs have not been clarified.

然而，对于这些DEM数据的地形信息容量特征却未能从理论上予以阐明。

youdao

China would require an extensive database of accurate topographic information to use terrain comparison (TERCOM) guidance.

中国需要一个大规模精确地形信息数据库去用于地形匹配(TERCOM)制导。

youdao

The design and development of the topographic data extraction information system based on non-metric digital imagery.

基于非量测数码影像的地形数据采集信息系统设计与开发。

youdao

In anticipation of military operations, UNESCO has already provided the topographic features relative to the location of sites to the concerned General Staffs, as well as individual brochures and information for soldiers to prevent damage to cultural heritage.

UNESCO: MEDIA SERVICES