PUMA adjacency matrix?

On TIGERweb you can turn on the PUMA layer and see what PUMAs are around the area you are looking at. Not sure if that is what you were wanting or not.

In reply to Barbara Gibson:

Thanks, Barbara -- I need the full 2351 x 2351 matrix... I can't be doing those PUMAs one by one, I need to read the whole file and process it.

In reply to Stas Kolenikov:

I believe that there are packages in R and in Stata that will produce in adjacency matrix from a GIS shape file

In reply to Matthew Brault:

Thanks, Matthew -- do you mean like this -- stackoverflow.com/.../874882

In reply to Stas Kolenikov:

I'm not as familiar with the R packages, but I have used shp2dta and spmap in Stata.

In reply to Matthew Brault:

Matthew, I see. I don't think they produce the adjacency matrix. But I guess I can ask Kevin Crow who produced them.

In reply to Stas Kolenikov:

If you have the layer and you have access to ArcGIS, you should be able to produce such a matrix using the Polygon Neighbors tool. I recently did this for tracts in LA county. The output is "long" in the sense that you'd have multiple rows for "source_FIPS" with a unique "neighbor_FIPS" - you also get the length of the shared border and whether or not there's a "node" (corner adjacency).

In reply to Diana Lavery:

Should have stated this above: the Polygon Neighbors tool is under "Analysis Tools" -> "Proximity" in ArcGIS Toolbox.