Different default symbology in arcmap when loading rasters

Andreas — Tue, 08 Jan 2019 14:17:58 GMT

I wrote some script tools to extract several rasters from a dem and load, order and draw them in a group layer. Extractions happens with RasterCalculator_sa and SetNull, so all Rasters have one constant value=1. When loading these rasters back into an empty document, I get different results in terms of symbology types on different machines (all 10.6.1).

Machine A loads with symbology type "Stretched", while Machine B with Symbology "UniqueValues". Because I need to set the same symbology to these layers with arcpy, this causes trouble when i use ApplySymbologyFromLayer_management to do that (You can't aply a symbology layer with a different symbolgy type).

Rasters are stored with unsigned integer in a file geodatabase with raster.save:

rastemp = arcpy.gp.RasterCalculator_sa('("%s" %s)*%s'%(raster_layer, queryTuple[1], queryTuple[0]))

raster1 = arcpy.sa.SetNull(rastemp,1,"Value=0")

raster1.save(outputname)

and later loadeds into a group layer:

result = arcpy.MakeRasterLayer_management(raster_workspace + "\\%s"%inputname, shortname)

arcpy.ApplySymbologyFromLayer_management(layer, symb_layer)

arcpy.mapping.AddLayerToGroup (df, group_lyr, layer)

These are only code snippets, but I think, it's not a problem with scripting, but with a different environment or something like that. Any suggestions?

Re: Different default symbology in arcmap when loading rasters

Andreas — Wed, 09 Jan 2019 16:25:06 GMT

Swapping the lines like this seems to solve the problem:

arcpy.mapping.AddLayerToGroup (df, group_lyr, layer)

arcpy.ApplySymbologyFromLayer_management(layer, symb_layer)

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Different default symbology in arcmap when loading rasters

Re: Different default symbology in arcmap when loading rasters