Please, forgive my 2 cents on this: Depending on which projection each system is using, distance calculation may (and usually) differ by that much and maybe more. As far as I know, Google uses a Mercator-like projection on a spherical Earth model, which is not correct since Google coordinates refer to the WGS-84 ellipsoid. So you can expect differences, greater with higher latitudes.
So don't use Google as an accurate reference. all the best, Paulo 2014-02-20 17:23 GMT-03:00 WanMil <[email protected]>: > Hi Gerd, > > which difference do you expect regarding the indirect links? I want to get > an idea what I should check on my device. > > I have compiled a map using the patch and it seems that distances are > slightly underestimated. > One example: The distance between Hambug, An der Alster and Munich, > Maximiliansplatz: > MapSource: 776km > Google Maps: 788km > Both use the same route. > > I didn't notice it before. > > WanMil > > Hi all, >> >> attached is a patch for r3065 in the high-prec-coord branch. >> >> It should improve long distance routing, as it adds additional >> arcs from minor roads to major roads (so called indirect links). >> Maybe the improvement is only seen on the device. >> >> It would be great to hear some test results (good or bad), >> compared to trunk r3057 and compared to r3065. >> >> A compiled binary is here: >> |http://files.mkgmap.org.uk/download/179/mkgmap.jar >> >> |Gerd >> >> >> >> >> _______________________________________________ >> mkgmap-dev mailing list >> [email protected] >> http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev >> >> > _______________________________________________ > mkgmap-dev mailing list > [email protected] > http://www.mkgmap.org.uk/mailman/listinfo/mkgmap-dev >
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