Different input values for raster calculator

Question

Hello all,

I am building a sub-model that needs to take a raster from a dataset and multiply it by a value that I input into the model as a parameter.  This is easy to do with a single raster, but I want to iterate through multiple rasters in a dataset, and for each individual raster I need to multiply it by a different value, e.g. Raster 1 * 2.5, Raster 2 * 4.7, etc...

The values need to be parameters that I can input each time I run the model.  The only thing I have come up with so far is to make the value a parameter, but the model will use that value for every raster in the dataset (see image).

[ATTACH=CONFIG]17788[/ATTACH]

Can I write a python script that prompts each value before the model runs?  Or is this doable through model builder?

Thanks,
Robin

RasterCalc.jpg

RobinCheskin · Answer

Thanks for the assistance Kass, it worked! 🙂

JamieKass · Answer

Sorry, it's been a while since I've used ModelBuilder. The correct syntax for the expression is:rasterVal("%Name%")

The code block can remain the same, as the variable in the function definition can be anything you choose. This should work.

RobinCheskin · Answer

So I tried this in the Code Blockdef rasterVal (BinRaster):
  if BinRaster == 'Bin_Rec_VMC_JAS_10':
    return 1.866
  elif BinRaster == 'Bin_Rec_CADSHJAS10':
    return 1.634

Keep getting the same error that BinRaster is not defined. I then tried arcpy.Describe(BinRaster).name in the second line replacing BinRaster, but I get the same error...