[GRASS-user] bug in v.out.ogr ?

GRASS GRASS user
1

Hello people

When I export a polygon, vector map as lines or boundaries to a shapefile
using v.out.ogr I have no problems.

However when I use "area" all I get are NULLs in the attribute fields and
GRASS spits out :
"GRASS_INFO_WARNING(18151,1): 7 features without category written"

I tried MapInfo, GML, Shapefile they all do the same thing.

Is there anyway to get my digitized data out of GRASS 6.0.1 in the form of
polygons with the attributes?

Thanks
Paul

2

On Wed, 17 May 2006 22:09:00 +0200
Paul Surgeon <surgpub@telkomsa.net> wrote:

Hello people

When I export a polygon, vector map as lines or boundaries to a
shapefile using v.out.ogr I have no problems.

However when I use "area" all I get are NULLs in the attribute fields
and GRASS spits out :
"GRASS_INFO_WARNING(18151,1): 7 features without category written"

Are you sure you have areas in your Grass vectors? Please note area
in Grass consists of a boudary (often/usually without attributes or
even categories) and a centroid, obligatory with categories.

What is the v.info output for your vector?

Maciek

--------------------
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3

On Wednesday 17 May 2006 23:17, Maciek Sieczka wrote:

Are you sure you have areas in your Grass vectors? Please note area
in Grass consists of a boudary (often/usually without attributes or
even categories) and a centroid, obligatory with categories.

Thanks!
I didn't realize that GRASS was so strict about polygons needing centroids.
Seems to work fine now that I've added centroids.

Paul