[mkgmap-dev] Inter-tile routing failures - not all our fault?

Sat Aug 15 11:16:10 BST 2009

Sorry to say I too have tried to find a problem with the Garmin maps and failed. No matter what combination of tile crossings, it always seems to do the right thing. I probably tried 20-30 combinations of routes across various tile borders. Is that a big enough sample size to see the problem or shall I keep trying?

I've attached one example where everything looks good despite multiple crossings.

Chris

AS> did some experiments in Mapsource and Garmin maps don't suffer from
AS> this problem.
AS> 
AS> found a place where the direction of the route defines which way is
AS> chosen. makes perfect sense because right turns are faster and
AS> easier than left turns.
AS> 
AS> Mapsource will even choose the longer way across the tile boundary
AS> to avoid the left turns.
AS> 
AS> Is there anything I can check for? map is not protected and should
AS> be possible to load in Gpsmapedit.
AS> 
-------------- next part --------------
A non-text attachment was scrubbed...
Name: routing.png
Type: image/x-png
Size: 119254 bytes
Desc: not available
Url : http://lists.mkgmap.org.uk/pipermail/mkgmap-dev/attachments/20090815/7de49fe7/attachment.bin 