Bug
The prescribed Python syntax for complex conditional expressions does not work outside of the Raster Calculator.
| Bug ID Number | BUG-000087994 |
|---|---|
| Submitted | June 1, 2015 |
| Last Modified | June 11, 2020 |
| Severity | Medium |
| Applies to | ArcGIS for Desktop |
| Version found | 10 |
| Operating System | Windows |
| Operating System Version | 7 64 Bit |
| Status | Known Limit |
Additional Information
The expression below won''t work in python, because map algebra take raster object as input, while "Random1.tif" would be treated as string but not raster in the expression ""Random1.tif">0.1". >>> Con(("Random1.tif" > 0.1),"Random1.tif",Con(("Random2.tif">0.1),"Random2.tif",0.1)) In stead, defining a raster object first for this layer, then the complex expression should work. >>> rasob = arcpy.sa.Raster("Random1.tif") >>> outras = Con((rasob > 0.1),"Random1.tif",Con((rasob> 0.1),"Random2.tif",0.1))Workaround
Using the syntax containing the <where_clause> parameter from the following help resources, it is still possible to create complex Conditional expressions. 10.0: http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//009z00000008000000.htm. 10.2: http://resources.arcgis.com/en/help/main/10.2/index.html#//009z00000008000000. 10.3: http://desktop.arcgis.com/en/desktop/latest/tools/spatial-analyst-toolbox/conditional-evaluation-with-con.htm.Steps to Reproduce
Bug ID: BUG-000087994
Software:
- ArcGIS for Desktop
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