routing across tile borders
One of my cycle map users reported an issue about non routable roads across tile borders. I investigated the case and came to the following conclusion: -roads marked with toll=yes are not routable across a tile border in case of pedestrian routing. -within the tile itself, routing is ok -Car or bicycle navigation respond as expected, no problems here -this isssue is only observed in Mapsource, not in Basecamp nor on the GPS. -I tested it with several maps and also older mkgmap versions they all show the same issue. BTW I use toll=yes to mark all roads without a cycling route to force the routing on cycling routes when you choose toll road avoidance. Is this a known issue?
I have found a workaround that forces pedestrian routing across the tile borders, simply by setting toll road avoidance ON. This seems very irrational because the issue is that roads that are blocked across the tile borders are the ones that carry the flag toll=yes, but somehow they are only accessible in this mode. Clearly there is a bug somewhere...
I investigated the case and came to the following conclusion:
-roads marked with toll=yes are not routable across a tile border in case of pedestrian routing. -within the tile itself, routing is ok -Car or bicycle navigation respond as expected, no problems here -this isssue is only observed in Mapsource, not in Basecamp nor on the GPS. -I tested it with several maps and also older mkgmap versions they all show the same issue.
BTW I use toll=yes to mark all roads without a cycling route to force the routing on cycling routes when you choose toll road avoidance.
Is this a known issue?
It would be interesting, if you could compile a testmap with cgpsmapper to crosscheck. Maybe cgpsmapper doesn't have this bug - then it would be an mkgmap bug (and based on long distance routing with mgkmap created maps, I think it is likely such a bug exists). If however an identical cgpsmapper created map has the same problem, then it will be difficult to know whether both cgpsmapper and mkgmap got it wrong (they are still largely based on the same garmin map sourcecode analysis), or whether the bug is on Garmins side. Actually however I would guess it's an mkgmap and or mkgamp/cgpsmapper bug - as tile borders have always caused problems. On 30.08.2012 13:59, Minko wrote:
I have found a workaround that forces pedestrian routing across the tile borders, simply by setting toll road avoidance ON.
This seems very irrational because the issue is that roads that are blocked across the tile borders are the ones that carry the flag toll=yes, but somehow they are only accessible in this mode. Clearly there is a bug somewhere...
I investigated the case and came to the following conclusion:
-roads marked with toll=yes are not routable across a tile border in case of pedestrian routing. -within the tile itself, routing is ok -Car or bicycle navigation respond as expected, no problems here -this isssue is only observed in Mapsource, not in Basecamp nor on the GPS. -I tested it with several maps and also older mkgmap versions they all show the same issue.
BTW I use toll=yes to mark all roads without a cycling route to force the routing on cycling routes when you choose toll road avoidance.
Is this a known issue?
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-- keep on biking and discovering new trails Felix openmtbmap.org & www.velomap.org
Sure it would be interesting Felix, unfortunately I don't have the knowledge to work with cgpsmapper. I suspect it is a Mapsource bug, in Basecamp or on the GPS routing works as expected. Anyways, just mentioning this bug plus the workaround, so anyone can deal with it.
participants (2)
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Felix Hartmann -
Minko