Oh, I should also mention that if I copy a feature to another layer which uses a different CRS but the same units, then the field calculator returns a _slightly_ different area (e.g. NZGD2000 vs NZGD49).
> -----Original Message----- > From: Alister Hood > Sent: Friday, 2 September 2011 10:28 a.m. > To: '[email protected]' > Cc: [email protected] > Subject: RE: [Qgis-user] How Do I Set Field Calculator Units For Area > > Hi Giovanni, > Either you are mistaken, or there is a bug. I have OTFR enabled, and the > field > calculator returns the same area when I set the project CRS to EPSG:32074 > (which uses feet), as it does when I set the project CRS to any normal CRS > which uses metres. > > Alister > > > -----Original Message----- > > From: Giovanni Manghi [mailto:[email protected]] > > Sent: Thursday, 1 September 2011 7:58 p.m. > > To: Alister Hood > > Cc: [email protected] > > Subject: RE: [Qgis-user] How Do I Set Field Calculator Units For Area > > > > Calculations are in the project CRS unit if OTFR is enabled, if not, the > > layer CRS unit is set in the general tab of the project properties. > > > > cheers > > > > -- Giovanni -- > > > > On Thu, 2011-09-01 at 11:18 +1200, Alister Hood wrote: > > > Hi there, > > > I *think* the area calculations are always in the unit for the layer's > > > CRS. So you could either: > > > - find out what this unit is, and convert the areas to square feet by > > > multiplying by the correct factor, or > > > - convert the layer to a CRS which uses square feet. > > > N.B. there is a feature request to enable coordinate conversion in the > > > field calculator (although I didn't mention that it would be useful also > > > for area and length calculations). See http://hub.qgis.org/issues/4078 > > > > > > Alister > > > > > > > Date: Wed, 31 Aug 2011 11:18:32 -0500 > > > > From: Andrew Novak <[email protected]> > > > > Subject: [Qgis-user] How Do I Set Field Calculator Units For Area > > > > Calcs? > > > > To: [email protected] > > > > Message-ID: > > > > > > > <CAO0Lqnon=aJMKGUb=BPacqxgn+PGn4G2vpe8sn=epxyt+pk...@mail.gmail.com> > > > > Content-Type: text/plain; charset="iso-8859-1" > > > > > > > > The area calculations from my field calculator are in an unknown unit. > > > I > > > > simply want my units to be square feet. How can I set my units in the > > > field > > > > calculator?? > > > _______________________________________________ > > > Qgis-user mailing list > > > [email protected] > > > http://lists.osgeo.org/mailman/listinfo/qgis-user > >
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