topographic feature survey

例句：

1. 1. The survey team conducted a topographic feature survey in the area.
   调查队在该地区进行了地形特征调查。
2. 2. The survey was crucial for understanding the topographic features of the region.
   这次调查对于理解该地区的地形特征至关重要。
3. 3. The survey revealed that the terrain is quite rugged and hilly.
   调查发现，该地区地形崎岖不平，多山。