topic Re: Least-Cost Path from Points to Polylines in ArcGIS Pro Questions

Least-Cost Path from Points to Polylines

AmyNewsam — Mon, 22 Mar 2021 21:15:28 GMT

Hello,

I'm trying to determine least-cost paths from points to polylines (see snip below). Is this possible? The examples in the help pages use polygons, with only one starting and one ending feature, so perhaps I can't use multiple features and perhaps they must be of the same feature type? I'm also noticing an error that my input starting point is outside of my cost surface, even though it is not.

Any thoughts much appreciated! 🙂

Re: Least-Cost Path from Points to Polylines

DanPatterson — Mon, 22 Mar 2021 22:12:27 GMT

Cost Path (Spatial Analyst)—ArcGIS Pro | Documentation

Creating the least-cost path—ArcGIS Pro | Documentation

there is no geometry limitation and your origin(s) have to be within the cost surface otherwise there is no way to determine a path.

Re: Least-Cost Path from Points to Polylines

AmyNewsam — Mon, 22 Mar 2021 23:36:48 GMT

Hi Dan,

I just can't get the tool to allow me to enter anything other than a points file in the Input Ending Point variable. I have multiple lines and polygon files in the gdb, but nothing other than points files will show up as options.

Re: Least-Cost Path from Points to Polylines

DanPatterson — Mon, 22 Mar 2021 23:49:52 GMT

You need origin and destination points on those.

Perhaps you should look at the new distance tools

Migrating from legacy distance tools to distortion free distance tools—ArcGIS Pro | Documentation

Perhaps

Optimal Region Connections (Spatial Analyst)—ArcGIS Pro | Documentation

Re: Least-Cost Path from Points to Polylines

AmyNewsam — Tue, 23 Mar 2021 16:06:38 GMT

Ah, I see. OK, I will take a look at that link. To be honest, I am having difficulty understanding how all the different tools are used - cost distance, cost path, path distance...but I will keep plugging. 🙂 Thanks for your help, Dan.

Re: Least-Cost Path from Points to Polylines

DanPatterson — Tue, 23 Mar 2021 16:48:27 GMT

No problem

Re: Least-Cost Path from Points to Polylines

AmyNewsam — Wed, 07 Apr 2021 19:16:33 GMT

Solution found! Big thanks to the people at Esri for working with me on this one! 🙂

1) Using the Cost Distance tool, I used the lines feature (just one line as a test) as "input raster or feature source" and a slope raster as my cost surface.

2) Using the Cost Path tool, I used the points file and the two output rasters from the Cost Distance tool.

3) I converted the resulting raster paths to lines using the Raster to Polyline tool.

Re: Least-Cost Path from Points to Polylines

Anonymous User — Wed, 23 Feb 2022 21:00:17 GMT

Hi Amy,

I recommend using the newer DistanceAccumulation and OptimalPathAs Line tools.

For an introduction to weighted distance analysis, Kevin Johnston has just authored this excellent set of blogs. Here is the first one:

https://www.esri.com/arcgis-blog/products/spatial-analyst/analytics/distance-analysis-simplified/

Regards,

-Jim TenBrink

spatial analyst team

Re: Least-Cost Path from Points to Polylines

AmyNewsam — Thu, 24 Feb 2022 17:47:48 GMT

Thanks so much for this suggestion, and the link to the blog. 🙂