In an arcpy script, I run a Union on a list of geometry objects. The output is set to an empty geometry object. The Union runs fine. What I am trying to do is then feed that output into the Dissolve tool. No matter how I format the input, I get the following error:
Parameters are not valid. ERROR 000732: Input Features: Dataset in_memory\f8537CACB_AB51_4BDC_B8E7_0895F11E6AF0 does not exist or is not supported
ESRI help files indicate that tools set to output to an empty geometry object return a list of geometry objects. The output from the Union tool gives
<Geometry object at 0x26d25910[0x27397068]> when queried with repr(). I have tried putting the Union result directly into the Dissolve tool and likewise the 0 index item from the result, seeing as it supposed to be a list. Both result in an error, the latter saying that a geometry object is not indexable. Here is a code snippet:
if len(lstHSGeoms) > 1: #Union geometries into one geometry lstHSUnionGeom = arcpy.Geometry() arcpy.Union_analysis(lstHSGeoms, lstHSUnionGeom, "ONLY_FID") arcpy.AddMessage(' lstHSUnionGeom: %s' % repr(lstHSUnionGeom)) lstHSOneGeom = arcpy.Geometry() arcpy.Dissolve_management(lstHSUnionGeom,lstHSOneGeom, None, None, "SINGLE_PART") hsOneGeom = lstHSOneGeom
The list lstHSGeoms is a Python list of polygon geometries, which have checked out as valid. The Union runs, but the Dissovle doesn't. I'm stymied. BTW, I tried using an empty string for the fourth parameter of Dissolve (seeing that it is supposed to be a string type), but it didn't make a difference.