Hi Clinton, On Tue, Aug 11, 2009 at 05:13:04PM +0200, Clinton Gladstone wrote: > On Tue, Aug 11, 2009 at 3:50 PM, > Elrond<elrond+openstreetmap....@samba-tng.org> wrote: > > > As rounding seems a current topic, I'm throwing in a patch > > that is sitting in my tree for a while now: > > How can I best test this patch? Is there something I can look for > without examining the binary data of the generated map? (For example, > what are typical symptoms of incorrect rounding?)
"incorrect" is probably too hard (except for the very special case, where I needed the better rounding). "suboptimal" would be a better term. To be honest, I don't know for sure how to really pin-point it. My idea on this: Set mapsource to "low detail" so that you get low resolution data even when zoomed in somewhat. Zoom in until the residential roads just apear and zoom out once (so that they disappear again). That way you get some lower resolution and should be able to see the "raster"-resolution of the points used to make up all the lines. About one fourth should be a little off relative to the others with my patch, I'd say... If you then switch the detail to "highest" to see the data with more resolution but at the same zoom, you should see the differences. Without the patch, maybe a few are farer away from the "real" position than with the patch. I hope this makes some sense to you... Cheers Elrond _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev