Nyall Dawson <nyall.daw...@gmail.com> writes: > On Tue, 14 Jul 2020 at 05:59, Randal Hale > <rjh...@northrivergeographic.com> wrote: >> >> I hope everyone is staying safe out there. >> >> So I've had some questions regarding setting up a QGIS Project and now >> I've convinced myself that I'm doing this wrong. When I get a new >> project in and I start setting up QGIS generally my project will be in a >> Stateplane projection - in this case EPSG:2274 (TN Stateplane NAD83). >> When I set up the project I change the ellipsoid to be >> "none/planimetric" (In the project properties). I don't set up the >> ellipsoid to be GRS 1980 and haven't for some time. > > Can I ask why you do this?
I too am boggled by this. EPSG:2274 is a Lambert Conformal Conic projection of NAD83, and I don't understand what it means to do that projection to/from geodetic coordinates without an ellipsoid definition. Using the GRS80 ellipsoid is part of the definition of this CRS, so if you change that you are using a different CRS that is not actually 2274, and that 2274prime CRS should throw an exception if you try to convert to/from NAD83 geodetic. So I'd say the bug is qgis/proj allowing transforms to/from a LCC-but-no-ellipsoid CRS. And maybe qgis allowing 2274-but-no-ellipsoid is a bug too. _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
