Speaking personally about what large orgs and what they want, I think it's
pretty simple. Have a look at commercial data and OSM and do a diff, what
are
the main things missing? Addressing for geocoding and turn restrictions
for
routing.
For addressing, I guess it is usually sufficient to have a street name -
the
exact addr:housenumber stuff is not needed I assume?
On the contrary, any use in a serious navigation system fails to meet
user expectation if not using accurate addr:housenumber. The #1 or #2
complaint in Skobbler's free US Smartphone navigation app is that the
location is .25 mile, 9 houses, or 1/2 block from the real location. It is
extremely useful and impressive to be delivered to the exact street address.
I would be surprised if there is any realistic way to crowdsource 99% of
addr:housenumber in the US. It's mindnumbing work, dangerous in some areas
where pedestrians and bikes are not safe.
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