On Tue, 8 Dec 2009, Matthias Julius wrote: >> Ah, you mean that these calculations should always be based on a >> Mercator transformation even if you have something else selected. > > Yes, Mercator or whatever is deemed the best approximation to reality > for a particular operation. Mercator might be the best to use for > most things because most maps are rendered in Mercator. And it is > probably good enough for all practical purposes. I hope nobody will > try to map the polar circle and expect JOSM to make it perfectly > circular. ;-)
I think in one place the "silently use Mercator for calculations" is already done. The best would probably be a local projection for the specific position of calculations (i.e. in the weighted center of points). >> Could probably be done, but would perhaps then require an >> explanatory note: "You have used the make circle function while >> using another projection than Mercator. The circle might not look >> like a real circle on your screen but believe us it is a circle!" >> ;-) > > Something like that. Maybe that can be displayed when one selects > another projection: "Please be aware that this projection distorts the > map and circles may not look like circles." Better our software produces correct results in the database than on the screen. So I think we can deal with the user interface when questions come up. Ciao -- http://www.dstoecker.eu/ (PGP key available) _______________________________________________ josm-dev mailing list [email protected] http://lists.openstreetmap.org/listinfo/josm-dev
