Bug report #14853: Histogram min/max values markers and graph are always the ones for values computed as "estimated" - QGIS Application - QGIS Issue Tracking

Bug report #14853

Histogram min/max values markers and graph are always the ones for values computed as "estimated"

Added by Lene Fischer over 8 years ago. Updated over 5 years ago.

Status:	Closed
Priority:	Normal
Assignee:	-
Category:	Rasters
Affected QGIS version:	master	Regression?:	No
Operating System:		Easy fix?:	No
Pull Request or Patch supplied:	No	Resolution:	end of life
Crashes QGIS or corrupts data:	No	Copied to github as #:	22806

Description

new description:
QGIS by default computes min/max using by default an accuracy that is set to "estimated (faster)", but if you switch to "Actual (slower)" then the values are the same as gdalinfo (both for single files or vrt rasters).

In the histogram graph min/max markers/boundaries are always set to the values computed as "estimated" even if the numeric values are the ones computed as "actual.

old description:
Creating a virtual raster the min / max is only showed for the first file.
Then I have to load the values.
In the histogram tab the values are also only for the first file. Trying to recompute - nothing happens.

Related issues

History

#1 Updated by Giovanni Manghi over 8 years ago

Status changed from Open to Feedback
Priority changed from High to Normal

does gdalinfo over the VRT file return the correct values for min/max? Cheers!

#2 Updated by Lene Fischer over 8 years ago

No - That is an issue I have reported in #14835

#3 Updated by Giovanni Manghi over 8 years ago

Lene Fischer wrote:

No - That is an issue I have reported in #14835

they seems to be two aspects of the same issue. If min/max values are wrong for a VRT then also histogram is wrong. Do you agree?

#4 Updated by Giovanni Manghi over 8 years ago

Operating System deleted (~~Windows 64 bit~~)
Affected QGIS version changed from 2.14.2 to master
OS version deleted (~~2.14.2~~)
Target version deleted (~~Version 2.14~~)
Status changed from Feedback to Open
Subject changed from Recompute Histogram for raster to Histogram min/max values markers and graph are always the ones for values computed as "estimated"