I am working on a project to prioritize open space (OS) for protection. One of the criteria we are using is the number of adjacent protected parcels to an unprotected one - the more adjacent parcels of already protected open space the better the connectivity.
I have two layers - one of protected OS and one of unprotected OS. I am trying to count the number of adjacent polys of protected OS to each parcel of unprotected OS. I can identify the adjacent protected OS parcels using "search within distance" of 75' to allow for cross stream and road adjacencies. However I cannot find a way to count the number of protected OS parcels that fall within the 75'.
Anyone have any suggestions?
Thx in advance for any help.
ps. running ArcGIS Pro 2.6.1.
I figured out a solution, and thought I would share it in case anyone else gets stuck like I did.
I have two layers - one of protected OS and one of unprotected OS. I am trying to count the number of adjacent polys of protected OS to each parcel of unprotected OS. A bit circuitous, but the following derives the desired answer.
Generate Near Table
Input Features = Unprotected_OS
Near Feature = Protected_OS
Output = Unprotected_OS_Near_Protected
Search Radius = 75’ (to allow for roads & streams)
Uncheck “Find only closest feature”
The new table will have one feature (row) for each parcel of Protected_OS adjacent to each Unprotected_OS parcel. Unprotected_OS parcels not adjacent to Protected_OS will have no entries.
The number of adjacent Protected_OS parcels is calculated using Frequency
Input = Unprotected_OS_Near_Protected
Output = Unprotected_OS_Near_Protected_Count
Frequency Field = IN_FID (the OBJECTID of Unprotected_OS)
Add FREQUENCY back into Unprotected_OS using Join Field
Input = Unprotected_OS
Input Join Field = OBJECTID
Join Table = Unprotected_OS_Near_Protected_Count
Join Table Field = IN_FID
Transfer Field = FREQUENCY
(which is the number of adjacent polys in Protected_OS for each poly of Unprotected_OS)