[Gdal-dev] what does gdal-grass provide?
Markus Neteler
neteler at itc.it
Thu Feb 3 12:36:36 EST 2005
On Thu, Feb 03, 2005 at 09:10:35AM -0700, Jack Varga wrote:
> What exactly does gdal-grass provide? How/where do I get the latest
> version (assuming I need it)?
>
> I'm experiencing odd behavior in qgis 0.6.0 when trying to load grass
> vector data and I was told that's because I compiled gdal with
> libgrass(51) and not with grass directly. Its the old 'which came first
> syndrome, the chicken (gdal) or the egg (grass). That is, you need gdal
> to build grass, but you need grass to build gdal, unless, (at least I
> thought), you build gdal with libgrass.
The procedure is:
- compile GDAL without GRASS support
- compile GRASS 6 with GDAL support (in fact, you cannot avoid it :-)
- compile GDAL/GRASS plugin (for raster support)
- compile QGIS with GRASS support (contains a GRASS 6 vector driver)
- launch GRASS 6
- lauch QGIS within GRASS, enable plugin, load r/v maps
Use it. See a screenshot here:
http://grass.itc.it/grass60/screenshots/gui.php
> FWIW, in case this helps anyone, (or someone knows better than I), the
> symptom one will see in this scenario is qgis crashes with...
>
> error_routine (fatal = 1): GISRC - variable not set
This indicates that you didn't use the plugin and probably didn't
run QGIS within GRASS.
Hope this helps
Markus
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