[GRASS5] v.digit topology question

[Michael Barton]

On Wednesday, October 29, 2003, at 10:01 PM, John Gillette wrote:

> v.type input=map_in output=map_out type=line,boundary
>
> John
>

John,

Thanks for the advice. I thought about this and almost tried it but did 
not. The reason is that GRASS considers my closed polygon object to be 
a boundary, but not an area. I want a filled area, not just the 
boundary of an area. v.type does not have an option to make a boundary 
an area.

How do I make this polygon an area? In GRASS 5.0.x, I assign it a 
centroid and ID number in v.digit. This doesn't seem to be an option in 
GRASS 5.7. At least when I place a centroid inside the boundary polygon 
it doesn't link up with the aforesaid polygon as far as I can tell. It 
just sits there as an independent centroid, unassociated with a 
boundary (generating an error to that effect when I run v.build).

____________________
C. Michael Barton, Professor
Department of Anthropology
PO Box 872402
Arizona State University
Tempe, AZ  85287-2402
USA

Phone: 480-965-6262
Fax: 480-965-7671