Do you have any roundabouts that look better? I suppose that the "low" precision garmin coordinates are the reason for this. I cannot give precise values but I think I remeber that the precision is sometimes less than 4 meters which means two distinct points have at least a distance of 4 meters. Otherwise they are mapped to the same coordinate. Have fun! WanMil
"Minko" ligfietser@online.nl wrote on 01/12/2010 at 02:26:51 +1100 subject "[mkgmap-dev] rendering roundabouts" :
Hendrik Oesterlin wrote: I have looked on it in JOSM. It is IMHO quite wrong data: a roundabout with a node every 30cm is not really correct.
I have removed plenty of its nodes at it has still more then enough.
The rendering issue is gone after the correction of the data?
Looks a bit better but still not quite a round circle: http://img543.imageshack.us/img543/1677/rotonde.jpg
I think that there are no round elements in OSM nor in Garmin.
In order to display a roundabout there are several strait segments.
You seem to use a quite thin line to display your roads. I am using bigger lines, so it is less evident to see the segments and optically it displays smoother.
On the top (north) side of your roundabout appears a dent. I do not know why, but I think that there are still much to many nodes to describe this small roundabout.