[Qgis-developer] Raster statistics

[Tim Sutton]

Hi

2010/7/14 Maxim Dubinin <sim at gis-lab.info>:
> Hi all,
>
> there are two sets of statistics now for rasters, visible when you
> open raster properties. One is taken aux-file if it exists using GDAL
> and another is some kind of internal QGIS one.
>
> Question why not use just one, GDAL's?
>

Back in the day when I wrote that, GDAL only estimated the stats
whereas the QGIS implementation computes them completely (I think this
situation is still the same today). Perhaps this functionality is not
something important and could be stripped out (or made into a plugin)
- it would certainly speed things up with rasters in some contexts.

Regards

Tim


> Implication is that QGIS stats are saved only session wide, if you
> remove raster from the project it needs to be recalculated.
>
> Maxim
>
>
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