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。
This paper makes an overall comparison between the characteristics of DEM and contour in terrain representation.
本文全面比较了DEM和等高线在地形表达中的特点。
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