I want to continue Enrico's questioning a bit. I have a similar issue with the way polygons display on my Garmin device. What appears as a smooth curve on the OSM slippy map are very blocky on the device. I have played with the reduce-point-density=4 and reduce-point-density-polygon=8 parameters in an attempt to smooth those curves but they seem to have no effect. I can live with the distortion but I wonder, what do these two parameters actually control?

Cheers,

Dave

On Fri, Jan 30, 2015 at 12:22 AM, Andrzej Popowski <popej@poczta.onet.pl> wrote:

Hi Enrico,

Garmin maps have limited resolution, about 2.4m. One can't draw precisely a line, which length is near to this resolution.

You can try to assign the same Garmin object type to all these segments, then probably mkgmap will be able to merge them and smooth.

--
Best regards,
Andrzej

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Dave Swarthout
Homer, Alaska
Chiang Mai, Thailand
Travel Blog at http://dswarthout.blogspot.com