本文提出地形图纸等高线的矢量化，进而提出生成三维地形模型的工程问题，阐述了扫描、预处理、细化等步骤-terrain contour drawings of vectorization, leading to formation of three-dimensional terrain model works, expounded the scanning, pretreatment steps such as thinning

shp格式的地市级图，可方便应用于mo，arcgis登中，不需要矢量化。-shp format to the municipal map, can be easily applied to the mo, in arcgis board, no vectorization.