Bug report #12622

In virtual fields $area function computes always values using "None/planimetric" ellipsoid

Added by Maxim Broos almost 9 years ago. Updated about 8 years ago.

Status:Closed
Priority:Normal
Assignee:-
Category:Field calculator
Affected QGIS version:master Regression?:No
Operating System: Easy fix?:No
Pull Request or Patch supplied:No Resolution:
Crashes QGIS or corrupts data:No Copied to github as #:20739

Description

New description:

in QGIS master area calculations seems to be (finally) sorted out/fixed. Anyway it seems that when computing $area in Virtual Fields then the None/planimetric" option for the ellipsoid regardless what the one is configured in the project properties.

Old description:

After doing some reading, i think i will file this problem as an issue:

I have a new shapefile layer in CRS 3857, in a project that has the same CRS. Under project properties, the measure tool is on ellipsoid WGS 84.

When i use the normal field calculator to create a new field for the layer and use the function "$area", the fields get filled with the correct values.

Now when i use the field calculator to add a virtual field with the function "$area", the values in the field represent the area value of the features calculated without ellipsoid (None/Planimetric).

I suppose it's similar or related to issue #12057

Related issues

Related to QGIS Application - Bug report #12057: Computed area is wrong when reprojection is active Closed 2015-01-26
Related to QGIS Application - Bug report #14082: area calculation in Field Calculator is depending on Outp... Closed 2016-01-10

Associated revisions

Revision 4094bae9
Added by Nyall Dawson about 8 years ago

Respect project ellipsoid and unit settings in virtual fields

Fix #12622, #4252

History

#1 Updated by Giovanni Manghi almost 9 years ago

  • Status changed from Open to Feedback

I "cannot" confirm, in the sense that here (qgis master) the area values computed with OTFR are completely bogus as per #12057

#2 Updated by Giovanni Manghi almost 9 years ago

  • Target version changed from Version 2.8.1 to Version 2.8.2

#3 Updated by Jürgen Fischer almost 9 years ago

  • Target version changed from Version 2.8.2 to Future Release - High Priority

#4 Updated by Giovanni Manghi over 8 years ago

  • Status changed from Feedback to Open
  • Subject changed from Virtual field $area function not using same Ellipsoid setting as normal field Calculator to In virtual fields $area function computes always values using "None/planimetric" ellipsoid
  • Affected QGIS version changed from 2.8.1 to master
  • Target version deleted (Future Release - High Priority)

#5 Updated by Nyall Dawson about 8 years ago

  • Status changed from Open to Closed

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