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1、提取面状道路河流:
ArcToolbox—>AnalysisTools—>Select;
2、面转栅格:
ArcToolbox—>Coversion—>ToRaster—>FeatureToRaster/PolygonToRaster,注意栅格大小设置;
3、栅格二值化:
ArcMap—>SpatialAnalyst—>Reclassify,有值的设为1,Nodata设为0;
4、用ArcCatalog新建一线状Shapefile;
5、用ArcMap加载ArcScan工具栏:
(1)在Editor工具栏设置Target为新建线状Shapefile;
(2)在ArcScan工具栏设置Raster为面状Raster;
(3)用ArcScan—>GenerateFeaturesInsideArea选中面状Raster,生成中心线。
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