1. A bowl-shaped topographic depression. 
   盆地碗状地形凹陷
2. A topographic surveying and mapping instrument used for determining directions, consisting of a telescope and attached parts. 
   照准仪用来确定方向的地形测量和绘图工具，包括望远镜和其它附件
3. Topographic study of a given place, especially the history of a region as indicated by its topography. 
   地志学对某地区的地形、地貌等进行的研究，特别指根据地志对该地历史的研究
4. All topographic maps except the 1 to 1000 basic map series are bilingual and the latter will be bilingual by 1999. 
   除1：1000比例基本地图系列地图外，所有地图都以中英文说明，而1：1000比例系列地图也将于一九九九年转为有中英文说明。
5. A system of aerial photography in which one vertical and two oblique photographs are simultaneously taken for use in topographic mapping. 
   三镜头航空测绘系统一种航空测绘系统，用于地形绘图中，可同时拍摄一张竖直的和两张倾斜的照片

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• 1. 地形点
  topographic mapping 地表测绘...topographic point 地形点...topographic reduction 地形改化
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