topic Re: Polyline around cluster of points in ArcGIS Pro Questions

Polyline around cluster of points

fred7 — Tue, 12 Nov 2024 12:23:16 GMT

I have csv file with sea surface temperature values. Each value has its coordinates. I am trying to interpolate the temperature values using "Spline with barriers". For that reason (barrier) I have to make new shapefile and draw polyline around these points. Is there more professional way to create barrier around cluster of points? For example somekind of buffer around points with certain distance from point.

Please look at the picture I added to this post.

Re: Polyline around cluster of points

DanPatterson — Tue, 12 Nov 2024 12:50:32 GMT

That is a "concave hull" which has not direct implementation in Pro.

There are a number of python implementations out there.

Concave Hulls ... the elusive container - Esri Community

for more discussion.

Re: Polyline around cluster of points

Robert_LeClair — Tue, 12 Nov 2024 16:43:18 GMT

In the Spline with Barriers GP tool, if you click the Environments tab at the top of the tool, you can set the Extent parameter based upon another layer, a graphic polygon and more to limit the processing extent of the output raster dataset.

Re: Polyline around cluster of points

SeaRM — Wed, 13 Nov 2024 02:45:15 GMT

You can build concave or just convex hulls grouping input points, maybe with added buffer.

https://xtools.pro/en/features/analysis-tools/concave-hull/

https://xtools.pro/en/features/analysis-tools/convex-hull/

Re: Polyline around cluster of points

fred7 — Fri, 15 Nov 2024 14:55:10 GMT

I did not want to install any extra plugins so I described my problem to Copilot (chatgpt). He suggested firstly to use tool "Aggregate Points", then tool "Buffer" and then "Polygon to Line", deleted some unwanted lines and finally using "Dissolve" to make the multi polyline to single polyline.

There is a tool "Minimum Bounding Geometry" which has Convex Hull, but unfortunaltely no Concave Hull that I needed, so skipped that tool.

Re: Polyline around cluster of points

SeaRM — Tue, 19 Nov 2024 06:03:30 GMT

You can run the XTools Pro Concave Hull online tool, it's free if your archived data is not more than 10 Mb.

https://xtoolspro.online/

https://online.xtools.pro/portal/tools/ConcaveHull