[mkgmap-dev] SplitterFrom GerdP gpetermann_muenchen at hotmail.com on Sun Aug 3 09:33:07 BST 2014
Hi all, I got no feedback on this. Please help me to decide how to fix the open splitter problems. Gerd GerdP wrote > Hi, > > we have two conflicting goals in the splitter algo: > 1) create tiles with a small aspect ratio (target : < 1:4) > 2) create tiles with similar number of nodes > > I have no idea which one is more important. > > A few possible solutions for the tile which has 1.112.635 nodes and a > height of 288, width of 89 grid units: > Vertical split at 269: 2 tile(s). The smallest node count is 23499 (4 %), > the worst aspect ratio is near 3.92 > Vertical split at 280: 2 tile(s). The smallest node count is 187764 (33 > %), the worst aspect ratio is near 9.27 > Vertical split at 284: 2 tile(s). The smallest node count is 503112 (90 > %), the worst aspect ratio is near 18.5 > Horizontal split at 79: 2 tile(s). The smallest node count is 528774 (95 > %), the worst aspect ratio is near 30.91 > > Any idea? > In the past, we tried to reduce the aspect ratio because routing over tile > boundaries caused trouble. > Is that still important? Or is it just a cosmetic problem now? > > Gerd > >> Date: Thu, 3 Jul 2014 20:41:05 +0200 >> From: > osm@ >> To: > mkgmap-dev at .org >> Subject: [mkgmap-dev] Splitter >> >> There is a ~20MB o5m file that needs to be split. But Splitter returns: >> >> "Cannot find a good split with exactly 2 areas" >> >> I hope a (the) dev can have a look at this? Thanks! >> >> The tile is here: >> http://osm.pleiades.uni-wuppertal.de/garmin/20140703/63240007.o5m >> >> See for more info and a link to the o5m file: >> http://forum.openstreetmap.org/viewtopic.php?pid=434024#p434024 >> _______________________________________________ >> mkgmap-dev mailing list >> > mkgmap-dev at .org >> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev > > _______________________________________________ > mkgmap-dev mailing list > mkgmap-dev at .org > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev -- View this message in context: http://gis.19327.n5.nabble.com/Splitter-tp5810219p5813499.html Sent from the Mkgmap Development mailing list archive at Nabble.com.
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