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ArcGIS Pro 2.3.2 : can't classify a raster with alpha band

Question asked by rgourrat@ag-carto.fr on Jul 23, 2019

I have a raster with two bands : a RVB band and an alpha band.

 

I want classify it but ArcGIS Pro show Classify Option only if the raster have 1band... is it normal ?

 

I try the tool extract band and i extract only the band 1 (RVB)


but i lost the "no data" information and now i have a value every where on the extent raster and i don't want it.

 

Can you help me to flat the 2 bands in one band and then have the possibility to use the classify option ?

 

Thanks for your help

 

Rémy

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