The extraction of contour lines from Grid DEM is a primary function in computer-aided cartography and GIS.

从规则高程格网中自动提取等高线是地理信息系统以及计算机制图的基本功能。

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The extraction of contour lines from Grid DEM is a primary function in computer-aided cartography and GIS.

从规则高程格网中自动提取等高线是地理信息系统以及计算机制图的基本功能。

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