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

Martin Koppenhoefer dieterdreist at gmail.com
Tue Dec 4 11:26:56 GMT 2012

2012/12/4 Friedrich Volkmann <bsd at volki.at>:
> Pieren <pieren3 at gmail.com> wrote:
>> One principle I like in OSM is "one feature, one OSM element":
>> http://wiki.openstreetmap.org/wiki/One_feature,_one_OSM_element
> An address is not a feature. An address is an attribute of a feature. An
> address never exists on its own in the real world. There cannot be an
> address somewhere in no man's land. It always refers to some property.

generally agree with you, but you might also see it as a feature (in
which case a node is a poor representation)

>> A single address should be tagged only once. If you have several POI's
>> with the same address, tag the address on its own node.
> This is not how mappers usually handle this case. They set the address on
> each POI, because otherwise applications cannot find out which POI has which
> address.

applications could find out which POIs are inside which
address-polygon, but it requires some processing, it is not
impossible, but it might take too long if you want up to date data
(incremental updates) depending on your calculation capacities.

> There are many possibilities where to put the node, but each of them has
> some cases where it won't work, and there are always arguments and edit wars
> about this. This is because each of the position is only part of the truth.
> The whole truth is that an address is actually an attribute of a 2- oder
> 3-dimensional object.



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