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<body class='hmmessage'><div dir='ltr'>Hi,<br><br>we have two conflicting goals in the splitter algo:<br>1) create tiles with a small aspect ratio (target : < 1:4)<br>2) create tiles with similar number of nodes<br><br>I have no idea which one is more important.<br><br>A few possible solutions for the tile which has 1.112.635 nodes and a height of 288, width of 89 grid units:<br>Vertical split at 269: 2 tile(s). The smallest node count is 23499 (4 %), the worst aspect ratio is near 3.92<br>Vertical split at 280: 2 tile(s). The smallest node count is 187764 (33 %), the worst aspect ratio is near 9.27<br>Vertical split at 284: 2 tile(s). The smallest node count is 503112 (90 %), the worst aspect ratio is near 18.5<br>Horizontal split at 79: 2 tile(s). The smallest node count is 528774 (95 %), the worst aspect ratio is near 30.91<br><br>Any idea? <br>In the past, we tried to reduce the aspect ratio because routing over tile boundaries caused trouble.<br>Is that still important? Or is it just a cosmetic problem now?<br><br>Gerd<br><br><div>> Date: Thu, 3 Jul 2014 20:41:05 +0200<br>> From: osm@na1400.info<br>> To: mkgmap-dev@lists.mkgmap.org.uk<br>> Subject: [mkgmap-dev] Splitter<br>> <br>> There is a ~20MB o5m file that needs to be split. But Splitter returns:<br>> <br>> "Cannot find a good split with exactly 2 areas"<br>> <br>> I hope a (the) dev can have a look at this? Thanks!<br>> <br>> The tile is here: <br>> http://osm.pleiades.uni-wuppertal.de/garmin/20140703/63240007.o5m<br>> <br>> See for more info and a link to the o5m file:<br>> http://forum.openstreetmap.org/viewtopic.php?pid=434024#p434024<br>> _______________________________________________<br>> mkgmap-dev mailing list<br>> mkgmap-dev@lists.mkgmap.org.uk<br>> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev<br></div> </div></body>
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