topic Re: Find 3 nearest features in ArcGIS Pro Questions

Find 3 nearest features

NathanEnge — Wed, 02 Dec 2020 17:59:52 GMT

Does anybody have a methodology to return the "top 3" closest point features from another point feature class?

I have two point datasets. For each record in one dataset, I want to find the top 3 closest dataset in another.

The "Near Analysis" returns only one closest feature.

Re: Find 3 nearest features

DavidPike — Wed, 02 Dec 2020 18:30:19 GMT

You have the point distance tool Point Distance—Help | ArcGIS for Desktop

but the results could obviously be quite large. a search radius would reduce this but obviously might not suit most use cases.

When you get the table you could then wrangle it, something like create a cursor and produce a dictionary of all input OIDs as a key, the value being a list of a list - [[distance, OID], [distance, OID], [distance, OID]....]. Iterate over the dictionary, sort the values and select the 3 smallest values and grab the OIDs.

This wouldn't be very hard to implement, though I do hope someone has a more trivial way.

Re: Find 3 nearest features

JoshuaBixby — Wed, 02 Dec 2020 18:40:58 GMT

What about Generate Near Table (Analysis)—ArcGIS Pro | Documentation? (Pro or ArcMap)

Re: Find 3 nearest features

Robert_LeClair — Thu, 03 Dec 2020 17:57:27 GMT

I know the Find Nearest tool in ArcGIS Insights does this rather easily. In the UI, one can limit the search to a certain number of features and/or a distance.