I experienced the same issue with a my new Montana 600... I first realized it when I miss a turn and magically I gained 5 mins.
Now I guess I know why! On Tue, Aug 19, 2014 at 6:56 PM, Bernhard Hiller <[email protected]> wrote: > Cze´sć Andrzej, > > thanks for this (bad) information. Looks like the Oregon 600 (an outdoor > device) uses the newer algorithm. > Well, it means, I can now stop optimizing for the "correct" route, and > perhaps rather try to "optimize" the calculated time for the selected route > (i.e. get it closer to my driving times)... > > Am 16.08.2014 14:46, schrieb Andrzej Popowski: > > Hi Bernhard, >> >> Garmin has 2 version of routing algorithm, older and newer. Older is used >> by Mapsource, older nuvi, probably by outdoor devices. Newer algorithm is >> used by BaseCamp and last 2-3 generations of nuvi. >> >> Newer algorithm is designed for speed of calculation rather than quality >> of results. Finding fastest way is based on road classes. At longer >> distances device uses only class 4 roads ignoring shortcuts with lower >> class. That's why you can optimize route manually. >> >> Older algorithm is more precise, it can use lower class roads, when class >> 4 roads are missing. Calculations are longer. But probably you still can >> find better route manually. >> >> > _______________________________________________ > mkgmap-dev mailing list > [email protected] > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev >
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