[Qgis-developer] GRASS requirements changed

[Radim Blazek]

It seems that the raster map is really in a different zone, you
could/should get the same error in GRASS (depends on current mapset).
Try to compare zone in location/WIND location/mapset/WIND and
location/mapset/cellhd/map, AFAIK the zone (projection in general)
must be the same.
It could be that location zone was changed after the map was created.

Radim

On Tue, Mar 16, 2010 at 4:52 PM, John C. Tull <jctull at gmail.com> wrote:
> Hi Radim,
>
> I built trunk on my OS X system. I tested the provider on a grass location that is in EPSG 26911. I set the project to that epsg code, but I get this error when trying to load a raster:
>
> Cannot draw raster
> Cannot start module
> command: /Applications/qgis1.5.0.app/Contents/MacOS/share/qgis/grass/modules/qgis.d.rast map=angrin_gb at jctull window=739283,4.00302e+06,765408,4.07309e+06,320,859<br><br>WARNING: Raster map <angrin_gb at jctull@jctull> is in different zone (11)
> than current region (0)
> WARNING: Unable to open raster map <angrin_gb at jctull@jctull>
> ERROR: Unable to open raster map <angrin_gb at jctull
>
> The raster shows up as a gray box. The same is true of other grass rasters I tried to load.
>
> Regards,
> John
>
> On Mar 15, 2010, at 1:10 PM, Radim Blazek wrote:
>
>> 1) GDAL-GRASS driver is no more required, GRASS rasters are accessed
>> directly using GRASS libs not via GDAL
>>
>> 2) GRASS libraries must be compiled with exceptions support. This was
>> always required, but it was not explicitly stated in INSTALL.
>> On Linux with gcc just run GRASS configure with additional CFLAG:
>>    CFLAGS="-fexceptions" ./configure ....
>> On windows it seems to work without special options (at least in
>> osgeo4w, Jef, which compiler are you using?)
>> I have no idea about OSX, here is small test package
>> http://trac.osgeo.org/qgis/attachment/ticket/1878/except.tar
>>
>> The reason for this requirement is, that GRASS G_fatal_error is
>> calling exit() and the only way to avoid QGIS exit on every error in
>> GRASS (which does not have to be necessarily fatal for QGIS, e.g.
>> cannot open layer ...) is to set custom error routine (
>> G_set_error_routine) which throws c++ exception which is caught in
>> QGIS-GRASS plugin. To support this, GRASS libs (which are in C) must
>> be compiled with support for exceptions.
>>
>> I have modified doc/INSTALL.t2t
>>
>> Radim
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>
>