Hi Tim
Thanks for the info about the stats. I'm going to commit what I have so
far as it already fixes some issues.
By the way I just noticed that the histogram tool in raster properties
is not working any more for me.
This should work again after the next commit.
Regards,
Marco
Am 25.06.2012 10:33, schrieb Tim Sutton:
Hi
On Mon, Jun 25, 2012 at 9:39 AM, Marco Hugentobler
<[email protected]> wrote:
Hi
While fixing the raster issues (in a branch), I'm trying to clean out the
raster layer class. Especially, I'm trying to remove symbology related
elements from the raster layer (like mRedBandName etc.) and have the
symbology only in the renderers .
Now I'm not sure what to do with the band statistics. QgsRasterLayer stores
and caches QgsRasterBandStats. However I see in the gdal provider that GDAL
caches the statistics as well. So my question is if it is ok to remove the
statistics related members in QgsRasterLayer and go directly to the raster
providers. Or is there a reason to have it on layer level that I missed?
IIRC there is a slow stats gathering implementation in
QgsRasterProvider which is virtual and can overloaded by providers
that are able to get the stats more efficiently. I have some unmerged
code that cleans up the raster stats rendered output which I will
commit after you have done your changes, but no I can't think of any
reason why the provider should not be the canonical source for stats
and the stats calls in the raster layer class removed.
By the way I just noticed that the histogram tool in raster properties
is not working any more for me.
Regards
Tim
Regards,
Marco
--
Dr. Marco Hugentobler
Sourcepole - Linux & Open Source Solutions
Weberstrasse 5, CH-8004 Zürich, Switzerland
[email protected] http://www.sourcepole.ch
Technical Advisor QGIS Project Steering Committee
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--
Dr. Marco Hugentobler
Sourcepole - Linux & Open Source Solutions
Weberstrasse 5, CH-8004 Zürich, Switzerland
[email protected] http://www.sourcepole.ch
Technical Advisor QGIS Project Steering Committee
_______________________________________________
Qgis-developer mailing list
[email protected]
http://lists.osgeo.org/mailman/listinfo/qgis-developer
