[Qgis-developer] GRASS requirements changed

[Marco Hugentobler]

Hi

I'd like to discuss a raster redesign for 2.0 at the hackfest. I think a lot 
of the problems described come from the fact that the current raster provider 
is limited and makes sense only for image providers (e.g. WMS).
But this is more a long-term approach.

Regards,
Marco

Am Dienstag, 16. März 2010 14.39:08 schrieb Giovanni Manghi:
> Hi,
> 
> On Mon, 2010-03-15 at 21:10 +0100, Radim Blazek wrote:
> > 1) GDAL-GRASS driver is no more required, GRASS rasters are accessed
> > directly using GRASS libs not via GDAL...
> 
> The new GRASS provider solved  many problems, especially a few nasty
> bugs that made many GRASS modules not usable under Vista and Seven
> (caused qgis to crash). See for example #1945 and #2028.
> 
> Moreover it "solved" a QGIS critical bug that was not yet spotted:
> basically after closing a mapset (and leaving a GRASS raster in the
> legend), clicking on the canvas with a tool such the identify tool, made
> qgis crash. You can spot this bug in QGIS 1.4.
> 
> Nevertheless there are a few consequences in the QGIS "raster layer
> properties" that would need a fix, at least in the interface.
> 
> In short, the symbology, transparency and colormap menus now make a
> little sense for GRASS rasters as the options in there are not working
> except for the "global transparency" slider.
> 
> It would be useful to have back, if possible, the "transparent pixel
> list" and the colormap table.
> 
> 
> 
> In any case the qgis "raster layer properties" should be reorganized
> (simplified?) for GRASS rasters because as is now in trunk is puzzling
> for users.
> 
> 
> 
> I would like also to point that with the new GRASS raster provider an
> important plugin stopped to work (with GRASS rasters): "value tool".
> 
> this plugin is kind of fundamental when doing raster analysis/models,
> and considered the number of tools available in the GRASS toolbox it is
> highly probable you are doing it with GRASS rasters.
> 
> Using the identify tool to see raster values in a certain point is not
> really an option.
> 
> I would be really happy if this issues will be approached in the next
> dev meeting.
> 
> 
> 
> 
> thanks in advance
> 
> -- Giovanni --
> 
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-- 
Dr. Marco Hugentobler
HUGIS GmbH
Webereistr. 66
CH-8134 Adliswil
marco at hugis.net
www.hugis.net
Technical Advisor QGIS Project Steering Committee