Bug report #13051

Proportionnal symbol

Added by Fabien Cerbelaud over 5 years ago. Updated over 1 year ago.

Status:Closed
Priority:Normal
Assignee:-
Category:Symbology
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 #:21123

Description

Hi, I try the nighlty version of QGIS 2.9.25 and I have a problem with the size method in graduate symbol. The size method should be in categorized symbol and unique symbol but not in graduated. This is the first problem because we can't give a size to class in graphic semiology, each different value should have a different size.
The other problem is the mathematic calcul for the size, actually it's false, the right calcul is radius = square root(quantity/pi) we can after that multiply or split by a value all the radius value. To solve the problem of really small circle we could choose a minimum size for value under a custom limit. For the big circle we can choose a max value for the radius and find the most appropriated ratio between the max value we want and the radius initially calculate. I hope you could understant what I'm trying to say.
This is very important because the proportionnal symbol are really essential for cartographer and legend associated too.

History

#1 Updated by Giovanni Manghi over 5 years ago

  • Status changed from Open to Feedback
  • Affected QGIS version changed from 2.8.2 to master

2.9.25 is pretty "old", and there have been developments/fixes lately in this area, could you test qgis 2.10 or the new master, thanks.

#2 Updated by Fabien Cerbelaud over 5 years ago

Hi, I trying this morning with the 2.10 version available in OSGEO install and the two problems are still the same

#3 Updated by Giovanni Manghi over 5 years ago

  • Target version deleted (Version 2.10)
  • Operating System deleted (windows)
  • Priority changed from High to Normal
  • Status changed from Feedback to Open

I would suggest to raise this issues in the developers mailing list because I could not say if the actual implementation is wrong as you say or if it is as it is by design.

#4 Updated by Fabien Cerbelaud over 5 years ago

Hi, I raise this issues in the developers mailing list the 02/07 but nobody anwser. I hope someone tell me something about that and if it's not for this version I hope this could be realise for the next one

#5 Updated by Giovanni Manghi over 3 years ago

  • Easy fix? set to No
  • Regression? set to No

#6 Updated by Giovanni Manghi over 1 year ago

  • Status changed from Open to Closed
  • Resolution set to end of life

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