topic Lines that touch same polygon two times in Data Management Questions

Lines that touch same polygon two times

AzimjonSayidov — Thu, 15 Mar 2018 10:15:42 GMT

I have lines that touch neighboring polygons. But in some cases line touch same polygons two times, which I do not need.

Thus, I would like to select those line that touch one polygons two times and remove them.

Or, I would like to select lines that touch and connect different polygons.

I am using ArcGIS 10.4.1 with python, arcpy library.

I would be happy to have any suggestions to solve the case.

Re: Lines that touch same polygon two times

DanPatterson_Retired — Thu, 15 Mar 2018 11:31:57 GMT

it is hard to tell from the picture an example of a line that touches twice and where the intersection occurs.

Can you narrow in an example

Re: Lines that touch same polygon two times

AzimjonSayidov — Thu, 15 Mar 2018 12:02:06 GMT

Here, polygons number 0 and polygon number 3 are connected with blue lines. But there are some lines in black that only touch one polygons, touching only polygon number 0 or polygons number 3.

Re: Lines that touch same polygon two times

JakeSkinner — Thu, 15 Mar 2018 14:22:04 GMT

Hi Azimjon,

One way to accomplish this:

1. Convert the lines end points to vertices using the Feature Vertices to Points

2. Run a spatial join on the vertices point layer and the polygon layer

3. Run the summary statistics tool on the spatial join output specifying the following:

LINE_ID = unique identifier for line feature class

ID = unique identifier for polygon feature class

4. In the output table select all records that have a frequency of 2:

This will provide you with the unique LINE_ID for the features that touch the same polygon twice.