[GRASS-user] Can't dissolve based on column?

Nikos Alexandris nikos.alexandris at felis.uni-freiburg.de
Wed Jan 16 16:12:59 EST 2008


I just changed to "varchar" the same data (column) and I get... :

GRASS 6.3.0RC4 (Peloponnese_HGRS87):~ > v.dissolve input=clc00_clean
output=clc00_final_v layer=1 column=CODE_00
DBMI-SQLite driver error:
Cannot step:
SQL logic error or missing database

ERROR: Cannot fetch data
ERROR: Unable to open vector map <clc00_final_v_31774 at nik> on topology
       level 2
ERROR: Vector map <clc00_final_v> not found in current mapset


On Wed, 2008-01-16 at 22:08 +0100, Martin Landa wrote:
> Hi,
> 
> 2008/1/16, Nikos Alexandris <nikos.alexandris at felis.uni-freiburg.de>:
> > My column "CODE_00" was identified as "TEXT", not "varchar". So maybe
> > this was the problem (?)
> >
> > I merged the tiles outside of GRASS with ogr2ogr -update -append... etc.
> >
> > I did not try to merge with v.patch the tiles.
> >
> > Is there a difference?
> 
> yes, right. It fails when 'text' data-type is used. It should be
> fixed. I will try to take a look as soon as possible.
> 
> Martin
> 
-- 
Nikos Alexandris
.
Department of Remote Sensing & Landscape Information Systems
Faculty of Forestry & Environmental Sciences, Albert-Ludwigs-University Freiburg
.
Tel.  +49 (0) 761 203 3697 / Fax.  +49 (0) 761 203 3701 / Skype: Nikos.Alexandris
.
Address: Tennenbacher str. 4, D-79106 Freiburg i. Br., Germany
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