Yes, and in fact the PostGIS geomunion function uses the diss field
just fine to group by.
--
On Tue, Oct 20, 2009 at 4:24 PM, M S msei...@gmail.com wrote:
If you query two adjacent polygons, do they both have the same value
for the 'diss' attribute?
On Tue, Oct 20, 2009 at 7:05 PM, Roger
Hi all,
I'm having trouble creating a single, dissolved feature and exporting
it as a multipolygon. Here is what I've done:
- layer I started with:
v.info -t global_mask
nodes=5448
points=0
lines=0
boundaries=2727
centroids=2723
areas=2723
islands=2721
faces=0
kernels=0
primitives=5450
map3d=0
Is there output for the dissolve command?
Mark
On Oct 20, 2009, at 4:37 PM, Roger André ran...@gmail.com wrote:
Hi all,
I'm having trouble creating a single, dissolved feature and exporting
it as a multipolygon. Here is what I've done:
- layer I started with:
v.info -t global_mask
Yeah, kinda long, but here it is. fwiw, I loaded the file into
PostGIS and let it crank away at the dissolve. Was done after about
an hour, so while I'm thrilled to have the correct data, I'd still
like to figure out a solution in GRASS.
v.dissolve global_mask out=new_mask col=diss --o
100%
If you query two adjacent polygons, do they both have the same value
for the 'diss' attribute?
On Tue, Oct 20, 2009 at 7:05 PM, Roger André ran...@gmail.com wrote:
Yeah, kinda long, but here it is. fwiw, I loaded the file into
PostGIS and let it crank away at the dissolve. Was done after
