You create a pure vector-based drawing here and render a line here from source node to destination node.

您创建了一个纯粹基于矢量的绘图，并且显示了一条从源节点到目标节点的连线。

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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。

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This means that a paper drawing can be scanned, line artwork automatically recognized and represented in a vector format that then can be imported to your CAD or drawing program.

也就是说，它可以扫描图纸，线条会被自动识别并转换为矢量格式，以能够方便的导入你的CAD绘图程序中。

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