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

[Eric Brelsford]

Thanks for the details, Brian. Maybe I'll make this a summer project for
myself.

eric

On Fri, May 6, 2011 at 11:04 AM, Brian Quinion <
openstreetmap at brian.quinion.co.uk> wrote:

> 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
>>
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>>
>
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