Adjacent Parcels w same owners

JohnFerro — Mon, 10 Jan 2011 19:50:48 GMT

Hey All,
I am asking for help on finding land owners that have adjacent parcels with a total area of over a certain number of acres. Is there a way to run this in the select by attributes? I have parcel data for a large area and need a faster way to do this.
Thnks for you help.

Re: Adjacent Parcels w same owners

BruceHarold — Tue, 11 Jan 2011 16:56:56 GMT

Hi John

The Python snippet below (requires ArcInfo 10) finds parcels that have neighbouring parcels greater than a certain area in size. I'm not sure from your post your exact requirement for selecting parcels, but you should be able to monkey with the logic to get there.

Regards

import arcpy
arcpy.env.overwriteOutput = True
parcels = r"C:\Temp\Parcels.shp"
lines = r"C:\Temp\Lines.shp"
arcpy.PolygonToLine_management(parcels,lines,"IDENTIFY_NEIGHBORS")
bigParcelList = [p.fid for p in arcpy.SearchCursor(parcels,"shape_area > 12000")]
hasBigNeighbourSet = set([l.right_fid for l in arcpy.SearchCursor(lines) if l.left_fid in bigParcelList] + \
[l.left_fid for l in arcpy.SearchCursor(lines) if l.right_fid in bigParcelList])
hasBigNeighbourSet.remove(-1) #any parcels on the edge of the world
bigneighbours = r"C:\Temp\BigNeighbours.shp"
expression = "fid in " + repr(list(hasBigNeighbourSet)).replace("[","(").replace("]",")")
arcpy.FeatureClassToFeatureClass_conversion(parcels, r"C:\Temp", "BigNeighbours.shp", expression)

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Adjacent Parcels w same owners

Re: Adjacent Parcels w same owners