[mkgmap-dev] rendering roundabouts

Fri Dec 3 17:51:44 GMT 2010

If you use the option reduce-point-density then the line is straightened 
using the douglas peucker algorithm. All segments between two endpoints 
or T-crossings are straightened. The points of crossings are not 
touched. Find a description of the algorithm at wikipedia.

http://de.wikipedia.org/wiki/Douglas-Peucker-Algorithmus

Regards,
Johann

Minko schrieb:
> On the dutch osm forum this particular roundabout has raised some questions about how mkgmap deals with filtering those nodes. Does it calculate an avarage position of a cluster of nodes that are (too) close to each other and group them into one node? Is this the reason why those jagged lines show up on the garmin img?
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