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I'm working with the ModelBuilder in ArcMap version 10.5.
I have two layers : one is a raster that has only 1 value per pixel. The second layer is a raster that has 4 attributes.
I want to use the raster calculator in order to subtract the second layer from the first layer.
The problem is that I don't find any way to specify the attribute that I want to use for the subtraction.

I have seen Specify a field in attribute table with raster calculator and tried using lookup :

Lookup("layer_1","attribute")-"layer2"

Also tried to write it like this:

"layer_1"."attribute"-"layer2

But that didn't work and I get errors. I have also tried to drop the other fields but it did not allow to drop any of the other attributes, and the only one I could subtract was the one I need.

Is there any way I can select the correct attribute for my calculation?

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    You need to create a separate raster from a second. Use Lookup tool for that
    – FelixIP
    Commented Jun 19, 2021 at 9:32
  • Wow! This Lookup("layer_1","attribute") does work!
    – FelixIP
    Commented Jun 20, 2021 at 4:45

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Much faster way to create raster in memory through Image Analysis window, e.g. in no time you can go from integer raster to float:

enter image description here

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/Don't forget to specify output type on Genaral tab./

enter image description here

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