[Gdal-dev] raster to vector with gdal_contour or other method

[Lijian Shi]

Hi, everyone,

 

I am trying to use gdal_contour to convert the raster data (.geotiff file)
into vector data (.shp file). Now I can use this command to create the close
line. Next step is to transform the geometry types from line to polygon. But
when the polygon is doughnut shape, the boundary of polygon will become two
lines and the problem becomes very complicated. 

 

Is there any other method or code to convert the raster data into polygon? 

 

Best regards,

 

Lijian

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