topic Re: How to find junction connected to three edges? in ArcGIS Network Analyst Questions https://community.esri.com/t5/arcgis-network-analyst-questions/how-to-find-junction-connected-to-three-edges/m-p/751698#M7205 <HTML><HEAD></HEAD><BODY><P>If you already had a network dataset, you could use the <A href="https://pro.arcgis.com/en/pro-app/arcpy/network-analyst/networkdataset.htm">arcpy.nax.NetworkDataset class</A> (requires ArcGIS Pro 2.4 or higher) to iterate over edges (the lines) and retrieve the lists of junctions attached to those edges.&nbsp; Then you could count which junctions show up more than three times.&nbsp; However, creating a network dataset can be somewhat arduous and is probably overkill for this problem.&nbsp; You would have to do a lot of filtering of the cursor results to make sure you were only getting the junctions that you created and not the automatically created system junctions that the network dataset creates.</P></BODY></HTML> Fri, 28 Feb 2020 22:48:15 GMT MelindaMorang 2020-02-28T22:48:15Z How to find junction connected to three edges? https://community.esri.com/t5/arcgis-network-analyst-questions/how-to-find-junction-connected-to-three-edges/m-p/751697#M7204 <HTML><HEAD></HEAD><BODY><P><STRONG>I have two layers: Layer A has Junctions as a Point file; Layer B has edges as a Line File.&nbsp;</STRONG></P><P></P><P><STRONG>The problem:&nbsp;</STRONG>I'm looking for junctions that are intersected by three (no more, no less) lines. Like this:&nbsp;</P><P>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</P><P>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;\</P><P>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;\&nbsp; &nbsp;</P><P>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;x-------------&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;/</P><P>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;/</P><P></P><P>I'm looking for a way to find these junctions with either a selection of by making a separate shapefile. It seems the way to do this might be through creating a Geometric Network or Network Analyst dataset, but I haven't been able to find much info in the forums and documentation online.&nbsp;</P><P></P><P>Has anyone done this before?&nbsp;&nbsp;</P></BODY></HTML> Thu, 27 Feb 2020 19:15:25 GMT https://community.esri.com/t5/arcgis-network-analyst-questions/how-to-find-junction-connected-to-three-edges/m-p/751697#M7204 PaulFrissora1 2020-02-27T19:15:25Z Re: How to find junction connected to three edges? https://community.esri.com/t5/arcgis-network-analyst-questions/how-to-find-junction-connected-to-three-edges/m-p/751698#M7205 <HTML><HEAD></HEAD><BODY><P>If you already had a network dataset, you could use the <A href="https://pro.arcgis.com/en/pro-app/arcpy/network-analyst/networkdataset.htm">arcpy.nax.NetworkDataset class</A> (requires ArcGIS Pro 2.4 or higher) to iterate over edges (the lines) and retrieve the lists of junctions attached to those edges.&nbsp; Then you could count which junctions show up more than three times.&nbsp; However, creating a network dataset can be somewhat arduous and is probably overkill for this problem.&nbsp; You would have to do a lot of filtering of the cursor results to make sure you were only getting the junctions that you created and not the automatically created system junctions that the network dataset creates.</P></BODY></HTML> Fri, 28 Feb 2020 22:48:15 GMT https://community.esri.com/t5/arcgis-network-analyst-questions/how-to-find-junction-connected-to-three-edges/m-p/751698#M7205 MelindaMorang 2020-02-28T22:48:15Z