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RasterExpressionEvaluator Expression problem

  • July 17, 2018
  • 2 replies
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Z
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Hi

I have a raster with the following properties:

I want to use the RasterExpressionEvaluator to set new values to each cell. I have written this expression: @if(A[0]<0.07, 0, @if(A[0]<0.5, 1, @if(A[0]<1, 2, @if(A[0]<1.5,3, @if(A[0]<2,4,5))))) but I can't get it work.

Any suggestion?

Best answer by takashi

Hi @zampy, the RasterExpressionEvaluator may not work if the input raster has Nodata.

Try removing Nodata with the RasterBandNodataRemover beforehand. You can restore Nodate with the RasterBandNodataSetter afterward, if necessary.

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2 replies

takashi
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  • takashiCelebrity
  • 7843 replies
  • Best Answer
  • July 17, 2018

Hi @zampy, the RasterExpressionEvaluator may not work if the input raster has Nodata.

Try removing Nodata with the RasterBandNodataRemover beforehand. You can restore Nodate with the RasterBandNodataSetter afterward, if necessary.

Why not inspect features with Visual/Data Preview and Feature/Record Information before writing them into a destination dataset?
Z
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  • zampy
  • Author
  • 3 replies
  • July 17, 2018

Hi @zampy, the RasterExpressionEvaluator may not work if the input raster has Nodata.

Try removing Nodata with the RasterBandNodataRemover beforehand. You can restore Nodate with the RasterBandNodataSetter afterward, if necessary.

Hi @takashi,

 

It works! Thanks

 

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