topic Re: Intersection count in Geoprocessing Questions

Intersection count

AnnaKenyon1 — Fri, 05 Aug 2011 08:59:15 GMT

I have downloaded the Integrated Transport Network (ITN) layer for UK roads. I want to identify and count the number of true (at least three legs) intersections. Any suggestions? Thanks.

Re: Intersection count

DuncanHornby — Tue, 09 Aug 2011 13:50:19 GMT

Anna,

You want to assign each node in the network it's "valency".

I'm assuming you've used productivity suit to import the data into a file geodatabase?

Do a spatial join using the geoprocessing tool of roadlinks (RdLk) intersecting nodes (RdNd) setting join operation to JOIN_ONE_TO_MANY

This creates a dataset with a row for each polyline intersecting a node

You can then use the Frequency tool or summary statistics tool to count TARGET_FID, this will count the number of times a node was selected.

This gives you a table where for each OBJECTID (refered to as TARGET_FID) has a count.

Duncan

Re: Intersection count

LauraMacdonald1 — Wed, 15 Jun 2016 09:35:50 GMT

Thank you so much Duncan! I've been trying to work out how to do this for a while and I finally got it to work using your instructions!

Re: Intersection count

BridgetBeesley — Mon, 18 Dec 2023 08:09:47 GMT

Such a simple solution 👏 thank you.

Is there a tool that does the same in ArcPro (that works)?