On 28/09/2010 10:00, Markus Metz wrote:
Micha Silver:
Markus Metz wrote:
Micha Silver wrote:
In any case, importing polygon shapefiles first as lines (not
boundaries),
doing the topology cleanup, and then convert to boundaries and add
centroids
seems to be the smoother way to go.
I object because
1. you would need to replicate the cleaning steps done by v.in.ogr
which has, amongst others, a snapping option
I never noticed that option.
http://grass.osgeo.org/grass64/manuals/html64_user/v.in.ogr.html
Still, importing unclean shapefile polygons, and correcting the topology is
often accompanied by much hair pulling...
Unfortunately yes. If data providers would only provide clean data...
I have partially good news: v.in.ogr in 6.4.1 and above is faster and
produces cleaner and smaller output. Further on, it shows progress
when cleaning polygons, indicating that something is happening.
Previously (up to 6.4.0), it went silent for quite some time on larger
polygon imports which annoyed me considerably, I want to see that
something is happening.
Great, I'm looking forward to seeing the improvements.
Markus M
This mail was received via Mail-SeCure System.
--
Micha Silver
http://www.surfaces.co.il/
Arava Development Co. +972-52-3665918
_______________________________________________
grass-user mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/grass-user
