In this paper, the methods of drawing contour line from terrain map, the vector of contour line and generating elevation data from vector data are discussed.
论述了从地形图中提取等高线、对等高线矢量化以及通过矢量数据生成高程数据的实现方法。
The indifference curve may be compared with a contour line on a map.
无差别 曲线可以与地图上的等高线相比拟。
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