[mkgmap-dev] rendering roundabouts

Wed Dec 1 19:21:08 GMT 2010

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 at 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.
>
>>> http://www.openstreetmap.org/browse/way/81912267/history
>
>>> 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.
>