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 _______________________________________________ Qgis-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-user
