Bug report #8430

Field Calculator - area failing - overflowing

Added by Jonathan Moules over 10 years ago. Updated over 10 years ago.

Affected QGIS version:master Regression?:No
Operating System: Easy fix?:No
Pull Request or Patch supplied:No Resolution:duplicate
Crashes QGIS or corrupts data:No Copied to github as #:17199


See attached.
I tried to use QGIS to calculate the areas of things, but as you can see in the dec2 (decimal size 19) and qgis_dec20 (decimal size 20) columns, it overflowed and went negative.

arcgisArea is what ArcGIS came up with.

2_Temp_Data.zip (1.45 MB) Jonathan Moules, 2013-08-08 05:06 AM

Related issues

Duplicates QGIS Application - Feature request #5546: Add a warning when vector fields/values are above the limits Open 2012-05-07


#1 Updated by Jonathan Moules over 10 years ago

As a follow on and having discovered #8431 - it turns out that the data is correct after the calculation - QGIS shows it in the attribute table correctly whether as an integer (with decimal place!) or decimal.

However, when you "save edits", it goes to the dbf file. It is at this point it turns into a negative.
The negative you get depends on format.
dec2 was actually "integer".
qgis_dec20 was a 20 width decimal.

#2 Updated by Giovanni Manghi over 10 years ago

  • Resolution set to duplicate
  • Status changed from Open to Closed

duplicate of #5546

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