[Qgis-developer] Wrong Area for large polygons in vector/Geometry Tools/Export/Add Geometry Columns

[Agustin Lobo]

Results for large polygons are wrong when calculated with
vector/Geometry Tools/Export/Add Geometry Columns
Example in
http://dl.dropbox.com/u/3180464/BorneoLCv2google.zip

Check, for example, polygons with ID 25967 and 26570: according to the table,
the areas are
25967: 8550196769
26570: 1736474738

while visual inspection indicates that 26570 is obviously much larger.

Both results are different than those calculated by R:

25967:    9294889613
26570: 205414657947

Discrepancies with R are particularly large for polygons with area > 1E+10

qgis 1.7.4 on ubuntu 10.04 32bits

This might be related to issue
http://hub.qgis.org/issues/4955

Agus