topic Re: Split polygons with polyline sections in ArcGIS Pro Questions

Split polygons with polyline sections

davidchamberlain2 — Fri, 26 Jan 2024 21:06:01 GMT

Hi,

I have a polygon layer that I need to split at every start and end point of a polyline layer. So the polylines make up a layer identifying roads and they are split up into thousands of connecting line sections. The polygons are an extent layer for the same road network as the lines, so they do sit over each other. I want to split the polygon layer at every point where a polyline section starts/stops. So the output polygons will be sectioned up at the same points as the lines are. Does anyone have any ideas how I can do this?

Thanks

Dave

Re: Split polygons with polyline sections

DanPatterson — Fri, 26 Jan 2024 21:51:45 GMT

Do you have a screen grab?

Re: Split polygons with polyline sections

DavidPike — Sat, 27 Jan 2024 18:41:28 GMT

Don't understand at all. Definitely needs some visuals.

Re: Split polygons with polyline sections

SeaRM — Mon, 29 Jan 2024 02:13:34 GMT

As I understood, you want to get polygons sliced some way by the lines contained the start-end points of roads, and these points are inside the polygons, not on the bounds of them, don't you?

Re: Split polygons with polyline sections

davidchamberlain2 — Mon, 29 Jan 2024 11:06:08 GMT

Hi all,

Thanks for your interest. I want to split the polygon like this, the red lines being the splits. I have merged what was multiple polygons into one. There are thousands of line sections. The angle of the splits doesnt matter.

Re: Split polygons with polyline sections

DanPatterson — Mon, 29 Jan 2024 12:52:24 GMT

Split Line at Point (Data Management)—ArcGIS Pro | Documentation

will split lines at points, if you can create a point layer from the start/end point

Generate Transects Along Lines (Data Management)—ArcGIS Pro | Documentation

allows you to generate perpendicular lines along a polyline, but you would have to query the transect lines to only select those that are at the start and end points. Those would be the ones to split the polygons with

At least something to look into

Re: Split polygons with polyline sections

davidchamberlain2 — Wed, 07 Feb 2024 14:41:23 GMT

Thanks for the suggestions all. In the end I used the subdivide polygons tool to split the entire layer into equal blocks, this with a spatial join to the line layer achieves the same result as splitting the polygons as I wanted to do originally just in a different way.

Thanks

Dave