Matrix of least-cost path values

TomPorteus — Thu, 18 Aug 2011 23:41:38 GMT

Hello,

Forgive me if this is a trivial post, but I haven???t been able to find the answer anywhere yet. I am working on animal movement and am attempting to run a least-cost path analysis across a uniform landscape that has a number of barriers to movement (lakes). My aim is to determine the minimum distance between c.100 point locations across the landscape. I want to create a matrix of distances, with each element (i,j) representing the minimum distance between location i and location j.

For any given ???start??? location, I have used the ???Cost Path??? tool in Spatial Analyst to construct least-cost paths between this and all of the other possible ???finish??? locations (essentially this is one row of my matrix). However being a relative novice at this, though I am able to view the calculated least-cost paths I can???t figure out how to output the actual length value of each path. Does anyone have the answer? I???ve assigned each raster cell a cost-value of 1.0 (barriers are NoData) so the path length should be comparable to distance ??? at least this is how I understand it, am I correct?

I am hoping it is a fairly simple geoprocessing task to be able to do all of these calculations at once rather than row-by-row ??? I would be grateful for any tips on getting started with that. I am running ArcGIS v.9.3.1, but have the option to upgrade to v.10 if necessary.

Thanks very much for any help in advance,

Tom

Re: Matrix of least-cost path values

MANUELLORO_AGUAYO — Fri, 18 May 2012 11:27:04 GMT

Hi Tom,

You should try this tool:
http://resources.arcgis.com/es/gallery/file/Geoprocessing-Model-and-Script-Tool-Gallery/details?entryID=94733035-1422-2418-8870-8AD6ED7508E3

I think it helps you.

Best.

Manu

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Matrix of least-cost path values

Re: Matrix of least-cost path values