Raster Cell Value Replacer: How to extract cell value

This is how I define the new values:

I don't think you can do this with a single RasterCellValueReplacer (RCVR).

 

Either chain as many RCVR as you have classes, making sure the new value isn't in the range of any of the subsequent classes.

 

 

Or use a RasterExpressionEvaluator with nested conditionals

if (A[0] >90, 1, if (A[0]>80, 2, if (A[0]>10, 3,0)))

Thanks! However, this does not work quite yet – I have either the new class 1 or 0 (NoData). It never gets into class 2 or 3 even though it should be getting there according to the source data.

Which option are you using?

Like this, with RasterExpressionEvaluator

Could you provide your full expresion

The following expression matches your original conditionals:

 

 

if (A[0]>=@Value(A:Suburban)&&A[0]<@Value(A:Residential),1,if (A[0]>=@Value(A:Urban)&&A[0]<@Value(A:Suburban),2,if (A[0]>=@Value(A:DenseUrban)&& A[0]< @Value(A:Urban),3,if(A[0]<@Value(A:DenseUrban),4,0))))

 

 

but if you don't have data above your residential value it can be simplified to

 

if (A[0]>=@Value(A:Suburban,1,if (A[0]>=@Value(A:Urban),2,if (A[0]>=@Value(A:DenseUrban,3,4)))

It still does not really work.

I attached a sample raster, do you achieve a classification into 5 classes with RasterExpressionEvaluator?

freiflaeche.tif

Put a RasterBandNodataRemover before the RasterExpressionEvaluator.

 

 

Bad things happen when there is a NoData value set.

 

 

I would use the expression

 

if (A[0]==0,0,if (A[0]>=@Value(A:Suburban,1,if (A[0]>=@Value(A:Urban),2,if (A[0]>=@Value(A:DenseUrban,3,4))))

 

and then you can use a RasterBandNoDataSetter to put back the NoData.