Feature request #6255

Add button to force recalculating stats of raster layers

Added by alobo - over 4 years ago. Updated over 1 year ago.

Status:Feedback Start Date:08/27/2012
Priority:High Due date:
Assigned to:- % Done:

0%

Category:Rasters
Target version:Future Release - Nice to have
Platform: Resolution:
Platform version: Pull Request or Patch supplied:No
Status info: Tag:

Description

Currently QGIS relies on mean and sd values on the
GTif if present for stretching based on sd. Sometimes
this information can be wrong and gdalinfo -stats does
not force recalculating stats (see http://hub.qgis.org/issues/5035).
The user should be able to force QGIS recalculating stats,
probably a button in Properties/Style would be a good option

History

Updated by Pirmin Kalberer over 4 years ago

  • Target version changed from Version 2.0.0 to Future Release - Nice to have

Updated by Paolo Cavallini over 3 years ago

  • Category set to Rasters

Updated by Médéric RIBREUX over 1 year ago

  • Status changed from Open to Feedback

Hello, bug triage...

isn't it the case when you use the "Load" button and the Extent and accuracy options in Raster Style tab ?
For me, triggering the "Load" button recalculate the stats of the raster layer.

Can you confirm this ?

Updated by alobo - over 1 year ago

The stats are certainly updated if the extent is changed, but
cannot check if they do in the case the extent remains that of the whole
raster object. I realised this problem 3 y ago because it happened
that I had a geotif with wrong stats information that were not updated
in qgis. I think you must check the code to know if this is still the case:
does qgis recalculate stats or does it rely on whatever is written in the geotif?

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