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Extract polygon from raster file

danilo_fme
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Hello all,

I want to extract a polygon features from a raster file. I know that has the transformer RastertoPolygonCoercer makes this job. The problem is that my raster file has _num_rows = 8701 and _num_columns = 5889, and this process is not work because the memory crash.

My raster file has a pixel Blank pixel RGB = 254, and i dont need this pixel value. My question is: has a way to remove this blank pixel RGB = 254 before to use the transformer RastertoPolygonCoercer?

Best answer by ebygomm

You can use the RasterBandNodataSetter and then set the extract nodata values parameter to No in the RasterToPolygonCoercer

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ebygomm
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  • ebygommInfluencer
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  • Best Answer
  • May 24, 2016

You can use the RasterBandNodataSetter and then set the extract nodata values parameter to No in the RasterToPolygonCoercer

danilo_fme
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  • danilo_fmeEvangelist
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  • May 24, 2016

Thanks @egomm It works with the transformer RasterBandNoDataSetter :)

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