When you identify a polygon feature using the Identify tool, the area is shown in the "(Derived)" part .. just expand this to see the area if you can't see it. Keep in mind that the units are in relation to the display projection, so it may show either deg^2 or km^2 depending on your settings.
As mentioned before, this is a derived attribute from QGIS for the identify tool. If you want to have this attribute set in the table, you have to do fancy things in a PostGIS database using triggers or views. -Mike On 14 March 2010 08:27, legio nostra <[email protected]> wrote: > Hello everyone, > > When creating a theme of polygons, it is possible the area of the polygon > automatically appear in the attribute > > table? Without having to make manual measurements with this tool: Measure > Area. > > > Thank you all > > -- orlando bernardo -- > > _______________________________________________ > Qgis-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/qgis-user > >
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