Excuse me, there are a method (option of mkgmap, etc.) to reduce the lines distorted? from OSM <http://gis.19327.n5.nabble.com/file/n5831842/mappa2.jpg> rendered for MapSource <http://gis.19327.n5.nabble.com/file/n5831842/mappa1.jpg> Thanks very much. --enrico -- View this message in context: http://gis.19327.n5.nabble.com/Lines-distorted-tp5831842.html Sent from the Mkgmap Development mailing list archive at Nabble.com.
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
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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I know this has been discussed a lot and it is annoying to see these distortions but having seen Garmin's City Navigator maps with the same problem, I fear there isn't much more we can expect of mkgmap...? -- View this message in context: http://gis.19327.n5.nabble.com/Distorted-lines-tp5831842p5831896.html Sent from the Mkgmap Development mailing list archive at Nabble.com.
Hi Nick, I think we still can improve distorted shapes, but lines are pretty to close to what is possible. I think of the Garmin format as a bed of nails. Near the equator the nails have a distance of ~2.3 m with resolution 24. If you go north or south, the horizontal distance decreases. Drawing a line on this bed of nails is like connecting some of the nails with a rubber band. Shapes are more complicated than lines because you may not want to produce gaps between them in some cases, e.g. with buildings. Gerd
Date: Fri, 30 Jan 2015 01:10:41 -0700 From: osm@pinns.co.uk To: mkgmap-dev@lists.mkgmap.org.uk Subject: Re: [mkgmap-dev] Distorted lines
I know this has been discussed a lot and it is annoying to see these distortions but having seen Garmin's City Navigator maps with the same problem, I fear there isn't much more we can expect of mkgmap...?
-- View this message in context: http://gis.19327.n5.nabble.com/Distorted-lines-tp5831842p5831896.html Sent from the Mkgmap Development mailing list archive at Nabble.com. _______________________________________________ mkgmap-dev mailing list mkgmap-dev@lists.mkgmap.org.uk http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev
Hi Gerd Sounds painful ; I like the analogy! -- View this message in context: http://gis.19327.n5.nabble.com/Distorted-lines-tp5831842p5831903.html Sent from the Mkgmap Development mailing list archive at Nabble.com.
participants (5)
-
Andrzej Popowski -
Dave Swarthout -
demon.box -
Gerd Petermann -
nwillink