topic Re: Generating polygons from line features where the lines aren't joined up in ArcGIS Pro Questions

Generating polygons from line features where the lines aren't joined up

SimonCrutchley — Mon, 18 Mar 2024 12:22:06 GMT

Hi there, I'm looking for help on the above. I have a large number of features which have been delineated by contractors using lines to split them up, rather than by drawing polygons. Is there a simple way to create polygons from this data, without manually having to go in and trace the boundaries? I attach a sample set of the data.

Thanks

Re: Generating polygons from line features where the lines aren't joined up

RichardHowe — Mon, 18 Mar 2024 13:00:18 GMT

Likely you'll never get a 100% reliable solution here given the inputs are human generated.

Take a look at the "Extend Line" tool, which you can specify a distance and the tool will continue the existing lines to the nearest intersecting feature. Once you've run that then "feature to polygon" is your friend.

I would suggest trial an error of the individual processes manually first and when you happen upon a happy set of parameters then perhaps string them together with model builder or python.

Re: Generating polygons from line features where the lines aren't joined up

BobBooth1 — Mon, 18 Mar 2024 13:43:16 GMT

You can also make polygons from lines in an edit session.

https://pro.arcgis.com/en/pro-app/3.1/help/editing/construct-polygons-from-features.htm

Re: Generating polygons from line features where the lines aren't joined up

SimonCrutchley — Mon, 18 Mar 2024 14:16:29 GMT

Awesome. Thanks. It hasn't found them all, and will need a bit of editing, but overall it will save a lot of time.

Thanks