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[mkgmap-dev] Stronger Intertile Routing Problems with Basecamp4.2.1?

From Felix Hartmann extremecarver at gmail.com on Tue Jul 9 20:42:53 BST 2013

Oh and I forgot to say, I know for certain it's the tile boundaries - 
because identical map with different split tiles, calculates the route 
just fine.

Too bad we don't have differently split tiles on identical original 
garmin non NT maps, to see if there are problems too!
On 09.07.2013 20:36, Felix Hartmann wrote:
> yes - I noticed that big changes in road_type (meaning more than 1) so 
> eg from 4 to 2 are less likely to be routed than 4 to 3. I tried that 
> out by creating identical left/right options - then testing which one 
> is choosen. 4 to 1 or 4 to 0 had actually quite big penalties. This 
> only mattered on Basecamp 4.1 or higher, new generation GPS with up to 
> date firmware. Mapsource or older Basecamp or older GPS firmware was 
> not really affected strangely.
> Road_speed I dunno - I would guess there are just the usual probs 
> (doens't like to do sharp turns on higher road_speeds).
> On 07.07.2013 13:06, Henning Scholland wrote:
>> Am 06.07.2013 12:43, schrieb Johannes Formann:
>>> After a short investigation a possible reason are large differences 
>>> in the
>>> road_type and road_speed.
>>> Anyone observed a similar behaviour?
>> I think Felix reported this problem some time ago, but this shouldn't
>> have anything to do with the new problem. I've also problems if
>> road_speed stays same.
>> @Geoff: While changing max-nodes splitter will create different
>> tile-boundaries, so problematic location will move. Is this the thing
>> which "solves" the problem for you?
>> Henning
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