I got a strange problem that occur when I combine rasters in my pythoncode.
Say I have rasters "NMD_COMBINE", "DosAreaRaster_r" and the result ends up in "rasterOut".
Call in code: arcpy.gp.Combine_sa(["NMD_COMBINE", "DosAreaRaster_r"], "combineRaster")
Actually all these rasters are "in_memory" so the actual path for all of them are :
The call to combine is fine but the result is a little strange regarding the given column names in the "combineRaster".
The first 3 column are standard: "OID", "Value", "Count". The other 2 for the combined rasters are:
Look at the columns above! The first one has almost a correct name but are truncated to 10 characters. The second has a completely different name compared to the source but is also 10 chars long. Doesn't it look like it's also truncated and that an "r" is missing?
Question: Why does this happen?
Normally this Pythoncode is embedded in FME-script but is now extracted and run i Arcmap 10.3 Python window.
If I run the exact same thing in ArcMap 10.7 the column names are correct in the combineRaster. Though I don't think it is the versions that make the difference in this case but what is? Something wrong with the installation? Environment variables?
esri raster fields are truncated at 10 chars. this has always been the case. you could try a different raster output, like the recommended *.tif format
Maybe you're right about that. The one thing thats suggest something else is that when I run this code embedded in FME-script on FME-server with ArcGIS 10.3 installed i got no problem.
I have specified column names in a json-structure. I use this json specification both when I read the combineRaster and when I write outcome vat-table. It work perfectly.
'Value' : 'LONG',
'Count' : 'DOUBLE',
'NMD_COMBINE' : 'LONG',
'DosAreaRaster_r' : 'LONG'
['Count', 'DosAreaRaster_r', 'NMD_COMBINE', 'Value']
A verification of vat-table in ArcMap:
Question: If the names where truncated in the "in_memory\\combineRaster", how can I then access them with my json specification of fields? I.e. full length column names.