> Date: Thu, 6 Sep 2012 00:14:04 -0700 (PDT) > From: Magnus Homann <[email protected]> > To: [email protected] > Subject: [Qgis-developer] What is the purpose of turning of 'on the > fly' crs transformation? > Message-ID: <[email protected]> > Content-Type: text/plain; charset=us-ascii > > Since 0.7 (?) we have included OTF transformation. In the beginning, the > code > was a bit buggy :-), and I believe that was one of the main reason for > turning it off. Now, it's more stable. So, hwat is the reason for being > able > to turn it off now?
Sorry for the late reply, but I find it useful to see quickly whether all my layers have the same CRS or not (which is useful in cases where you want to use a tool where the layers are required to be in the same CRS). > 1) Some use-cases handles 'raw' data where a CRS is not meaningful (or > maybe > unknown even). > 2) To skip the OTF code for stability. > 3) To skip the OTF code for speed. > > Measruement tools uses OTF code to be able to calculate on an ellipsoid. > Currently, when OTF is off, we don't allow that but usees planimetric > calculation only. Is this correct do you think? > > Magnus Alister _______________________________________________ Qgis-developer mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/qgis-developer
