Latest Contributions by DrewFlater

You can get info about the tool properties by right clicking a tool and select Properties, then go to the Parameters page.    The Detect Feature Changes tool uses a value table parameter with two string columns.   Use some code like this to have two parameter for picking the base and update layers, and a value table to pick the matching fields from the two datasets def getParameterInfo(self): """Define parameter definitions""" p1 = arcpy.Parameter(displayName="Input Base Features", name="base_Features", datatype="GPFeatureLayer", parameterType="Required", direction="Input") p2 = arcpy.Parameter(displayName="Input Updated Features", name="updated_Features", datatype="GPFeatureLayer", parameterType="Required", direction="Input") p3 = arcpy.Parameter(displayName="Compare Fields", name="compareFields", datatype="GPValueTable", parameterType="Optional", direction="Input") p3.columns = [['GPString', 'Base Fields'], ['GPString', 'Updated Fields']] params = [p1,p2,p3] return params def isLicensed(self): """Set whether tool is licensed to execute.""" return True def updateParameters(self, parameters): """Modify the values and properties of parameters before internal validation is performed. This method is called whenever a parameter has been changed.""" if parameters[0].valueAsText and parameters[1].valueAsText: desc_b = arcpy.Describe(parameters[0].value) desc_u = arcpy.Describe(parameters[1].value) parameters[2].filters[0].list = [field.name for field in desc_b.fields] parameters[2].filters[1].list = [field.name for field in desc_u.fields] return results like this:   ... View more

Thanks for bringing up this equivalency problem @jvenables  In Pro 2.9 this problem has been solved. You will find the planar AREA and LENGTH options (not Geodesic) in the Property choicelist you pictured above, even if your data has a geographic coordinate system, as long as you specify a projected coordinate system in the Coordinate System parameter (you can choose the Current Map option in the Coordinate System choicelist if your map is projected). Here is the planar Length property being selected for data in WGS 84, with a North American Equidistant Conic projected Coordinate System:   ... View more