topic Re: Weighted Overlay Table Invalid Class in Python Questions

Weighted Overlay Table Invalid Class

JacobSpear1 — Sat, 19 Nov 2022 08:10:13 GMT

I'm trying to run a weighted overlay on two separate integer rasters. I built the original overlay model in arcpro and exported the tool as script. I then modified the script to fit the syntax as shown on the ESRI help pages. Now when I run the script I receive (Unspecified error Class not registered). The landcover and slopeint classes reference existing raster files in the environment gdb. I have cropped out the middle portion of the script that prepares the rasters.

What did I do wrong?

#Import modules import arcpy from arcpy.sa import * from sys import argv LandCover = "LandCover" slopeint = "slopeint" intable = WOTable([[slopeint, 50, "Value", RemapValue([[0, 3], [1, 3], [2, 3], [3, 3], [4, 3], [5, 3], [6, 3], [7, 3], [8, 3], [9, 3], [10, 3], [11, 3], [12, 3], [13, 2], [14, 2], [15, 1], [16, 'Restricted'], [17, 'Restricted'], [18, 'Restricted'], [19, 'Restricted'], [21, 'Restricted'], [22, 'Restricted'], [23, 'Restricted'], [24, 'Restricted'], ["NODATA", "NODATA"]])], [LandCover, 50, "Class", RemapValue([['Open Water', 'Restricted'], ['Perennial Snow/Ice', 1], ['Developed, Open Space', 3], ['Developed, Low Intensity', 2], ['Developed, Medium Intensity', 1], ['Developed, High Intensity', 'Restricted'], ['Barren Land', 3], ['Deciduous Forest', 'Restricted'], ['Evergreen Forest', 'Restricted'], ['Mixed Forest', 'Restricted'], ['Shrub/Scrub', 2], ['Herbaceuous', 2], ['Hay/Pasture', 3], ['Cultivated Crops', 3], ['Woody Wetlands', 'Restricted'], ['Emergent Herbaceuous Wetlands', 'Restricted'], ['NODATA', 'NODATA']])]], [1, 3, 1]) helicoptersuitability = WeightedOverlay(intable) helicoptersuitability.save("helicoptersuitability")

Error Message:

Traceback (most recent call last):
File "D:\Documents\School\USC\586\586_Project_5\Project_5\SiteSuitability.py", line 78, in <module>
helicoptersuitability = WeightedOverlay(intable)
File "C:\Program Files\ArcGIS\Pro\Resources\ArcPy\arcpy\sa\Functions.py", line 10452, in WeightedOverlay
return Wrapper(
File "C:\Program Files\ArcGIS\Pro\Resources\ArcPy\arcpy\sa\Utils.py", line 55, in swapper
result = wrapper(*args, **kwargs)
File "C:\Program Files\ArcGIS\Pro\Resources\ArcPy\arcpy\sa\Functions.py", line 10449, in Wrapper
result = arcpy.sa.Apply(rasters, "WeightedOverlay", args)
File "C:\Program Files\ArcGIS\Pro\Resources\ArcPy\arcpy\ia\_ia.py", line 135, in Apply
return arcgisscripting._ia.Apply(in_raster=in_raster,
RuntimeError: Failed to apply Raster Function: 'WeightedOverlay' (Unspecified error
Class not registered

Re: Weighted Overlay Table Invalid Class

DanPatterson — Sat, 19 Nov 2022 09:40:18 GMT

reformatting the WOTable to make it easier to see what looks off.

for slopeint ... not class 20?

([[slopeint, 50, "Value", RemapValue([[0, 3], [1, 3], [2, 3], [3, 3], [4, 3], [5, 3], [6, 3], [7, 3], [8, 3], [9, 3], [10, 3], [11, 3], [12, 3], [13, 2], [14, 2], [15, 1], [16, 'Restricted'], [17, 'Restricted'], [18, 'Restricted'], [19, 'Restricted'], [21, 'Restricted'], [22, 'Restricted'], [23, 'Restricted'], [24, 'Restricted'], ["NODATA", "NODATA"]])], [LandCover, 50, "Class", RemapValue([['Open Water', 'Restricted'], ['Perennial Snow/Ice', 1], ['Developed, Open Space', 3], ['Developed, Low Intensity', 2], ['Developed, Medium Intensity', 1], ['Developed, High Intensity', 'Restricted'], ['Barren Land', 3], ['Deciduous Forest', 'Restricted'], ['Evergreen Forest', 'Restricted'], ['Mixed Forest', 'Restricted'], ['Shrub/Scrub', 2], ['Herbaceuous', 2], ['Hay/Pasture', 3], ['Cultivated Crops', 3], ['Woody Wetlands', 'Restricted'], ['Emergent Herbaceuous Wetlands', 'Restricted'], ['NODATA', 'NODATA']])]], [1, 3, 1])

Re: Weighted Overlay Table Invalid Class

JacobSpear1 — Sat, 19 Nov 2022 17:10:26 GMT

I just corrected that but no change in the error.

This is the code as generated form arcpro if I were to export the tool as python

out_raster = arcpy.sa.WeightedOverlay(r"('D:\Documents\School\USC\586\586_Project_5\Project_5\Project_5.gdb\slopeint' 50 'Value' (0 3; 1 3; 2 3; 3 3; 4 3; 5 3; 6 3; 7 3; 8 3; 9 3; 10 3; 11 3; 12 3; 13 2; 14 2; 15 1; 16 Restricted; 17 Restricted; 18 Restricted; 19 Restricted; 21 Restricted; 22 Restricted; 23 Restricted; 24 Restricted; NODATA NODATA); 'D:\Documents\School\USC\586\586_Project_5\Project_5\Project_5.gdb\LandCover' 50 'Class' ('Open Water' Restricted; 'Perennial Snow/Ice' 2; 'Developed, Open Space' 3; 'Developed, Low Intensity' 2; 'Developed, Medium Intensity' 1; 'Developed, High Intensity' Restricted; 'Barren Land' 3; 'Deciduous Forest' Restricted; 'Evergreen Forest' Restricted; 'Mixed Forest' Restricted; 'Shrub/Scrub' 2; 'Herbaceuous' 2; 'Hay/Pasture' 3; 'Cultivated Crops' 3; 'Woody Wetlands' Restricted; 'Emergent Herbaceuous Wetlands' Restricted; NODATA NODATA)) ;1 3 1"); out_raster.save(r"D:\Documents\School\USC\586\586_Project_5\Project_5\Project_5.gdb\suitabilityoverlay")

Re: Weighted Overlay Table Invalid Class

DanPatterson — Sat, 19 Nov 2022 19:54:39 GMT

I don't know. But even though the whole input to the weighted overlay tool is raw encoded (r" ... ) the paths of the inputs and outputs are not.

'D:\Documents\School\USC\586\586_Project_5\Project_5\Project_5.gdb\slopeint'

yields errors which vanish when done as

r'D:\Documents\School\USC\586\586_Project_5\Project_5\Project_5.gdb\slopeint'

You might want to try different gdb (saving location or raw encode the file paths in the above lines and try it from within your python IDE