[GRASS-user] Trouble with reprojecting a vector file

[Moritz Lennert]

On 27/12/13 18:27, Thomas Adams wrote:
> All,
>
> I'm using GRASS 7.0 svn from a few weeks ago on Ubuntu 13.10 (not that I
> think either is an issue). I have imported a fairly large shapefile from
> here: http://www.nohrsc.noaa.gov/data/vector/master/rfc_us.tar.gz --
> 3084 KB. It imports just fine into a lat/long Location and displays just
> fine, but when I try to reproject the map into a LCC projection
> Location, I lose feature data for most of the 12 (large) polygons. These
> polygons are displayed (unfilled with any color) in my map, and when I
> query them I get no attribute info; the other polygons (about 4 out of
> the 12) are fine. I have tried the reprojection several times with
> identical results. This same result occured with GRASS 6.4.x as well.
>
> I have successfully reprojected other vector maps from my lat/long
> Location into my LCC Location without issues. It seems I have hit a
> memory problem?? My computer has 8GB RAM.

I don't think that this is a memory problem. Sounds more like the 
polygons are not closed after reprojection. You can open the file in the 
digitizer to check. If that's the case, you can either correct manually, 
or you can use v.clean.

Moritz