I agree with Tobias on this. I am not sure what all the issues are and I know it can get complicated but more than once I have been bitten with wrong answers because of this.
I think it would be good to have a check box or drop down menu to be able to select geodesic routines to be used by the measure tool. If I ever get a QGIS development environment set up I have wanted to incorporate geographiclib routines (as it is better than Vincenty) as core routines assuming the work would be accepted. There are a number of geodesic algorithms missing from the QGIS API that would be good to add as well. Calvin On Thu, May 25, 2017 at 2:16 PM, Tobias Wendorff < [email protected]> wrote: > Hi Carlos, > > Am Do, 25.05.2017, 19:30 schrieb Carlos Cerdán: > > I understand your frustation (I've lived it), but QGIS doesn't lie, > > it is different from the way that some topics are done in another > > GIS. > > I know, but the field, where you can select the output clearly shows > "meters". So I expect the output to be meters. Why not write > "same as input"? Then it's not a lie anymore (other GIS do so). > > > You can get right metric values even if your layer and project are > > in Lat-long units. > > [snip] > > Yeah, I know this workflow, I am using it every day. But it's > nearly impossible to explain to the audition, why QGIS has this > kind of unexpected behavior. For a GIS, it should be a problem to > calculate distance as geodetic lines. I can tell any developer, > how to do it. > > The best way would be to fix the GUI or do a work-around with a > warning messagebox like I explain to Paolo. This would solve this > problem. > > FYI: I'm trying to convince users in the educational area to > switch to QGIS. Actually, they don't see those workflows as part > of "freedom", they see it as a bug. > > When an output field says "meters", you can expect it to be metric. > When an output field says "like input", you don't expect it to be > metric. Problem solved. > > Best regards, > Tobias > > _______________________________________________ > Qgis-user mailing list > [email protected] > List info: https://lists.osgeo.org/mailman/listinfo/qgis-user > Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
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