[Geocoding] Where do house numbers come from for Nominatim in the US?

[Brian Quinion]

Hi Eric,

Yes, nominatim uses house numbers from tiger as a fallback if the house
number is not found in the OSM data.

The best way to improve the house number coverage is simply to add the house
number to openstreetmap itself, either as number ranges, or as nodes or even
as building polygons with numbers.  Anything you add will be merged into the
data set.

The same goes for fixing places where the tiger data is wrong - add the
correct location to OSM and it will be used in preference.

--
 Brian

On 6 May 2011 14:35, Eric Brelsford <ebrelsford at gmail.com> wrote:

> Hi,
>
> I recently experimented using Nominatim in Brooklyn, NY to geocode around
> 400 addresses with house numbers. For the most part, the results are very
> usable. However, some streets don't seem to have any house numbers
> associated with them. For example, where
>
>     212 5th Ave, Brooklyn, NY
>
> returns a useful lat/lon near that house number,
>
>     602 Livonia Ave, Brooklyn, NY
>
> does not--it returns a lat/lon near the center of Livonia Ave.
>
>
> I don't see any house numbers on either of these streets in OSM, so I'm
> wondering where they are coming from. Do they come from TIGER data? Either
> way, how can I help add house numbers for the streets that seem to be
> missing?
>
> thanks,
>
> eric
>
> _______________________________________________
> Geocoding mailing list
> Geocoding at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/geocoding
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/geocoding/attachments/20110506/82a1246a/attachment.html>