Feature request #7975

Meaning of scale field not explained in Print Composer

Added by Aren Cambre almost 4 years ago. Updated almost 3 years ago.

Status:Open Start Date:06/02/2013
Priority:Normal Due date:
Assigned to:- % Done:


Category:Map Composer / Printing
Target version:Future Release - High Priority
Platform:Windows 7 x64 Resolution:
Platform version: Pull Request or Patch supplied:No
Status info: Tag:


In Print Composer's Item Properties pane is a Scale field. The meaning of this field is not explained. All I can figure out is if I reduce the number in it, that zooms in within the currently-selected item.

Note that this is not a support request. This is a feature request for the UI to do a better job explaining what this field means. I guess it has something to do with the number of projection units displayed on the horizontal dimension of the viewport of the item, but I am not sure.


Updated by Nyall Dawson almost 4 years ago

  • Assigned to set to Nyall Dawson
  • Priority changed from Normal to Severe/Regression

This should be a blocker - something has broken the scale calculation for composer map items, and numerical scale bars based off the map also reflect an incorrect value.

Updated by Nyall Dawson almost 4 years ago

  • Category deleted (33)
  • Assigned to deleted (Nyall Dawson)
  • Priority changed from Severe/Regression to Normal

Actually - I've tracked down the problem I was experiencing - I had changed the CRS for a project, but the map extents in the composer retained the old coordinate system's values. Updating the extent fixed the scale problems I was having.

Aren - does this sound similar to what you are seeing, or is this a different issue? What values are you seeing for your map scales?

Updated by Aren Cambre almost 4 years ago

I do have a project CRS specified, and Enable 'on the fly' CRS transformation is selected.

I'm seeing 360795 in Scale in the Print Composer. Extents are:
  • X min: 1254970.060
  • Y min: 1160240.042
  • X max: 1350219.940
  • Y max: 1226794.977

Updated by Paolo Cavallini about 3 years ago

  • Target version changed from Version 2.0.0 to Future Release - High Priority

Updated by Paolo Cavallini almost 3 years ago

  • Category set to Map Composer / Printing

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