[OSM-talk] Addr:streetnumber:first;last:left;right

[andrzej zaborowski]

2009/4/6 Marcus Wolschon <Marcus at wolschon.biz>:
> On Mon, Apr 6, 2009 at 8:44 PM, andrzej zaborowski <balrogg at gmail.com> wrote:
>> Hi,
>>
>> 2009/4/6 Sam Vekemans <acrosscanadatrails at gmail.com>:
>>> so for whats available in the dataset, along with the way listing the
>>> roadname;is_in and/or addr:city ... Is the listing of the first&last
>>> house number on the left side, as well as first/last on the right.
>
> it is "addr:city".
>
> There is no "left" or "right" as we use separate ways just for this.
> (There are reasond for it.) The perfect way are single houses
> drawn as polygons with building=yes and addr:housenumber=xy ,
> the next best thing nodes places where each house is and
> the next best thing is 2 or more nodes where single house-numbers
> are known connected by a way tagged addr:interpolaton=even/odd/...
> to we can calculate where each house would be.
>
> You can use Traveling Salesman to test actual, working
> house-number search.
>
>>> For the geobase2osm script we excluded this feature, as we couldnt
>>> figure the best way to tag.
>>> Now I found that the data is also available in the canvec set.
>>> So one option is to have it as a way over top of the roadway.
>>
>> We're importing a small number of streets from a project called UMP
>> pcPL that has similar housenumber data as you describe (for *some*
>> streets).  Here's how my script converts it to OSM:
>>
>> We add a addr:interpolation on each side of the way with an arbitrary
>> offset and with some simple heuristics to make it look correct
>> (although obviously it needs a manual check like all imported data -
>> to see that it corresponds with reality).  I didn't add any address
>> relations but addr:street value can be used to add relations
>> automatically if needed.  Here's a sample:
>> http://www.openstreetmap.org/?lat=52.23954&lon=21.10434&zoom=17&layers=B000FTF
>
> Sound cool!
>
> One suggestion:
> As this is automated anyway, try to add hints about what street the
> houses belong to.
>
> easy to implement version:
>  Simply add a tag add:street=nam to the interpolation-ways
>
> slightly less easy to implement but easier to evaluate in address-search:
>  add an associateStreet- relation
>
>
> I will download that area one of these days and play around with my
> address-seach a bit, okay?

Sounds great.  The problem with associating the addr:interpolation
ways with their associatedStreet is that the UMP (imported) data
generally contains the colloquial street names - abbreviated, and
without first names if the street is named after a person.  In OSM
data however, we expand them to full names and so the addr:street
value often differs from the actual street name - they can still be
associated, but the algorightm will be a little more complex, probably
will need to allow for a small *lexical distance* between the names
(i.e. like google search).

I guesstimate some 60% of city streets in Poland are named after
famous people.  So for a example a way in OSM might have

name=Paul Cézanne Street

and the imported housenumbers would have

addr:street=Cezanne (they also often drop non-ascii chars) because
that's what you would type into your car GPS and also what you would
address an evelope to when sending a letter.

Cheers