CAD地形图矢量化工具，为地形图的矢量化和扫描矢量化提供支持，如果好用，请给好评哦-CAD vectorization tools topographic maps, topographic maps for the vectorization and scan vector to provide support, if useful, please give praise Oh

扫描线算法适合对矢量图形进行区域填充，只需要直到多边形区域的几何位置，不需要指定种子点，适合计算机自动进行图形处理的场合使用，比如电脑游戏和三维CAD软件的渲染等等。(The scan line algorithm for vector graphics regional filling, need only geometric position until the polygon, do not need to specify the seed point for automatic comp