The processing works after vectorizing topographic maps were discussed, such as diluting, right Angle processing, deleting redundant points and lines.
讨论了地形图矢量化后的几项处理工作，如曲线上点的稀释、直角化处理、重复点线的删除、接边等。
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And the integrating raster with vector technology predigests the polygon overlaying operation, realizes inner span part vectorizing and speed up the process.
Image vectorization refers to the process of inputting digitized pictures or drafts to the computer, and then getting CAD file by vectorizing the digital data.