Feature request #6255

Add button to force recalculating stats of raster layers

Added by alobo - about 13 years ago. Updated over 8 years ago.

Status:Feedback
Priority:High
Assignee:-
Category:Rasters
Pull Request or Patch supplied:No Resolution:
Easy fix?:No Copied to github as #:15561

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 #5035).
The user should be able to force QGIS recalculating stats,
probably a button in Properties/Style would be a good option

History

#1 Updated by Pirmin Kalberer almost 13 years ago

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

#2 Updated by Paolo Cavallini about 12 years ago

  • Category set to Rasters

#3 Updated by Médéric RIBREUX almost 10 years 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 ?

#4 Updated by alobo - almost 10 years 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?

#5 Updated by Giovanni Manghi over 8 years ago

  • Easy fix? set to No

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