[OSM-talk] All you've ever wanted to know about the french cadastre

[maning sambale]

At least in my country, address is tied to lot parcels and not to
individual buildings.

And since we dont have parcel data, we add housenumber as nodes.

Maning Sambale (mobile)
On Sep 27, 2012 9:32 PM, "Simon Poole" <simon at poole.ch> wrote:

>
> Am 27.09.2012 15:03, schrieb THEVENON Julien:
>
>  *>>>> De :* Simon Poole <simon at poole.ch> <simon at poole.ch>
> >
> *>>>> *Supposedly the cadastre includes street names and house numbers,
> however
> *>>>> *of the 27 million buildings (plus 6 million wall=no) only a
> minuscule
> *>>>> *number have further information attached, matter of fact there are
> more
> *>>>> *nodes with addresses tagged in France than there are building
> outlines
> *>>>> *with house numbers. Why this is the case, I don't know, but house
> *>>>> *numbers etc. would be of far more immediate benefit to our data
> than
> *>>>> *just building outlines.
>
>  Some people put the house number on a node located where there is the
> building entrace ( and sometimes forgot to tag the entrance)
> Sometimes there are several house number on big buildings so house number
> is place on nodes instead of buildings.
> Some people prefer to place the number where it is located physically,
> near the street when an house has a long alley
> A lot of buildings outside cities does not have house number appearing in
> cadastre.
> This kind of reason can explain what you are observing....
>
>
> Just so there is no misunderstanding: even taking address tagged nodes in
> to account, the addresses / houses ratio is lower and at best not different
> than in other countries without countrywide access to  cadastre-like
> sources. 3% with nodes, 0.6% without, comparision CH: 18% / 12%. The
> numbers are from the respective taginfo instances.
>
> So the question remains why the information in not being added to the
> outlines.
>
> Simon
>
>
>
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