topic Re: Find not connected intersections in Data Management Questions

Find not connected intersections

JayKappy — Tue, 14 Aug 2012 13:15:28 GMT

I have a pipe network...
How do I locate intersections that are not connected say with in a foot or two....
There are locations that the pipes endpoints will near each other but should not be connected.

Is there a way to specifiy this tolerance and run a script that will locate breaks in the connectivity of the pipes at a specified distance?

Thanks

Re: Find not connected intersections

JayKappy — Tue, 14 Aug 2012 13:30:11 GMT

If I create a topology (dangles) I dont get to specify a distance....
THere a bunch of Endpoints that are being flagged...I would like to say that if it does not find another line or endpoint within a specified distance dismiss this location.

Thoughts? THanks

Re: Find not connected intersections

DanLee — Tue, 14 Aug 2012 17:17:30 GMT

Perhaps you can try this:
1. Run the Feature Vertices To Points tool with the DANGLE option (requiring ArcGIS 10 and ArcInfo license). The output contains all the dangle endpoints.
http://help.arcgis.com/en/arcgisdesktop/10.0/help/index.html#//00170000003p000000
2. Run the Spatial Join tool to join the dangle points with the lines with JOIN_ONE_TO_ONE as the join operation and WITHIN_A_DISTANCE as the match option. Specify the desired distance as the search radius. The output should have a Join_Count field. If the Join_Count value = 1, the dangle point is not connected to any lines other than its source line; if the Join_Count value is greater than 1, the dangle point is touching or within the distance to other lines; you can select these dangle points and then use them to select the lines (Select Layer By Location tool).

Depending on what you need to do, if you need to exclude the source dangle lines from the final selection, you would need more analysis steps.