[OSM-talk] Google Maps v.s. OSM routing in Berlin

[Jeremy Adams]

> 2009/9/17 Ævar Arnfjörð Bjarmason <avarab at gmail.com>:
> > Why doesn't OSM ever tell me to take a 270 degree turn into oncoming
> > traffic on a 6-lane highway and get onto the motorway_link on the
> > other side?
> >
> >
> http://maps.google.com/maps?f=d&source=s_d&saddr=B2%2FB5%2FHeerstra%C3%
> 9Fe&daddr=A115&geocode=FQQ6IQMdPXrKAA%3BFX38IAMdsmvKAA&hl=en&mra=ls&sll
> =52.493736,13.266249&sspn=0.002567,0.009645&ie=UTF8&t=h&ll=52.502622,13
> .277648&spn=0.001283,0.004823&z=18
> >
> >
> http://cloudmade.com/maps?lat=52.505434&lng=13.272686&zoom=15&direction
> s=52.50880994711401,13.266667127609253,52.49494458610386,13.26784729957
> 5806&travel=car&styleId=1
> 
> Here's a 'funny' example in the opposite direction. Compare
> 
> http://maps.cloudmade.com/?lat=39.583466&lng=-
> 76.129246&zoom=13&directions=39.57989335828052,-
> 76.15070343017578,39.603175259215426,-
> 76.0719108581543&travel=car&styleId=1
> 
> with
> 
> http://maps.google.co.uk/maps?f=d&source=s_d&saddr=N+Earlton+Rd+Ext&dad
> dr=39.602249,-76.071911&hl=en&geocode=FVDyWwId_gh2-
> w%3B&mra=dme&mrcr=0&mrsp=1&sz=13&sll=39.582936,-
> 76.100922&sspn=0.093139,0.154324&ie=UTF8&z=13
> 
> The Cloudmade/OSM route is about 28 times longer. I expect it's just a
> simple missing connection but it make a big difference in the NY to
> Washington DC route (1.3 times longer).
> 
> --
> Matt Williams
> http://milliams.com

There's a large chunk of one lane of I-95 missing.  I traced it from yahoo imagery in Potlach.

Such is the power of OSM.  :)

-Jeremy