[Tagging] Fwd: Door to door routing to buildings with multiple occupants

Dave Sutter sutter at intransix.com
Wed Dec 5 00:05:38 GMT 2012

Keep in mind the case of multistory buildings. In this case, the
polygons on the different levels are overlapping. The indoor mapping
proposals have a level relation in which to hold the polygons for the
different levels.

In an indoor formalism I would label the unit polygon with the unit
portion of the address and the building with the street address if
that is how the street numbers are broken down. (On the other hand
sometimes different units can have different street numbers within a
single structure.)

Without using an indoor formalism I think drawing the unit polygons
inside the building is the way to go. And, the poor man's version of a
polygon is always a point, so that is also an option too.


On Tue, Dec 4, 2012 at 4:18 AM, Martin Koppenhoefer
<dieterdreist at gmail.com> wrote:
> 2012/12/4 Ronnie Soak <chaoschaos0909 at googlemail.com>:
>> 2012/12/4 Martin Koppenhoefer <dieterdreist at gmail.com>:
>>> if you see the address as "feature" it should be an area and not a
>>> node, but if you add it to a POI I'd see it as an attribute and there
>>> is no problem in adding it multiple times. Putting an address-node on
>>> a building-outline to mark an entrance seems odd, why not tag the
>>> entrance with "entrance" and put the address on the whole building
>>> outline (or even on the whole site it applies to if you have this
>>> information)?
>> We are running in circles here.
>> Putting it on the building outline or the site outline/relation seems
>> right, but doesn't work for multiple addresses on the same
>> building/site.
> it does (if like in the examples given above the same appartment has
> multiple addresses you will add several addresses for the same polygon
> (e.g. by using multipolygons or overlapping ways)), and in the other
> case (multiple addresses inside the same building, but every spot has
> only one address) you won't attach the address to the whole building
> outline, but to the part it applies to.
>> You just said above that addresses are not features, but attributes.
>> So what is an 'address object' and how can I create multiple of them?
> no, I said you can see it either as attribute or as feature.
>> If you mean to create multiple building outlines to tag an address on
>> each, we are clearly in the realm of 'one feature, one OSM element'.
> delete the word "building" and we are there ;-), several polygons.
>> So an amenity node inside a building has an implicit relation to that
>> building and could 'inherit' its address. So there is, again: in
>> theory, no need for repeating the address on each POI.
> ...as long as you don't map the address on a node, yes.
>> In the real world, we should of course just add that little but of
>> redundancy because most data consumers and even our database are not
>> that 'spacial aware'.
> +1, spatial calculations on the fly are often too expensive, so
> preprocessing would be needed
>> I tried to find out what an address really points to here in Germany.
>> I wasn't successful. You get a house number for a parcel of land, even
>> without a house on it, but only if it is already connected to a
>> street.
> wrong question ("in Germany") because this is not regulated on a
> national level. Anyway, from the building law it seems clear that the
> site must be connected to a street because otherwise you won't be able
> to build something there.
>> When you build a house you definitely get one. Or the house
>> inherits the number from the parcel. But you can get more than one
>> number if you build multiple houses. (Or you can build additional
>> houses without a number.) You can also get more numbers if you have
>> multiple entrances to a building. But it is no problem for several
>> flats in the same building to share the same number too. I couldn't
>> find out on who's discretion this happens.
> on the discretion of you local authorities (you will get "the numbers
> necessary...").
> cheers,
> Martin
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