> I would suggest to run
>
> v.category inp=geo type=centroid out=new_geo op=add layer=2 --o
>

Thanks Markus! Now I'm getting somewhere. v.info shows geo and new_geo in perfect correspondence for areas, islands, boundaries, etc.

d.what.vect shows new_geo with the original data in layer 1 and the new data in layer 2. v.to.db successfully transferred the centroids (coor) and area to layer 2. However, I still don't see how to get the surficial geology column (surgeo) out of layer 1 into layer 2 without a join item. I know I'm missing something simple, but v.to.db just seems to allow a restricted set of values for option.

Thanks, Dave
--
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
David W. Roberts                                     office 406-994-4548
Professor and Head                                      FAX 406-994-3190
Department of Ecology                         email [email protected]
Montana State University
Bozeman, MT 59717-3460
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