[OSM-talk] House numbers... One more suggestion

Douglas Furlong douglas.furlong at gmail.com
Mon Jul 28 19:10:34 BST 2008


With the current scheme how would one numbering blocks of flats?

there is no explicit allowance in the current scheme as far as i can see.

On 7/28/08, Karl Newman <siliconfiend at gmail.com> wrote:
> On Mon, Jul 28, 2008 at 10:21 AM, Charlie Echo
> <openstreetmap at coutiere.com>wrote:
>
>> If things are clear, and if there is a consensus about using this
>> Karlsruhe
>> schema, let's have a vote on it.
>>
>> This will make things easier: we would then have a clean situation. This
>> would enable people to enter the data.
>> We may also adapt the tools then, e.g. create a function in JOSM that
>> "explodes" a way by creating parallel ways (for each continuous segment)
>> with pre-filled tags (street names, and so on) so that entering data is
>> easy
>> enough.
>>
>> Charlie Echo
>>
>>
> The Karlsruhe schema is fine for just showing numbers on a map, but I don't
> like it because it's not topological and therefore virtually impossible to
> use for other purposes. This is because the associated way is not directly
> encoded in the schema--it has to be derived by another means. That's just a
> whole lot more work for data consumers that are only trying to locate a
> street address a relative distance along a way (e.g., all current GPS
> navigation systems). Consider this use case: Given a street, I'd have to
> look through NN million nodes to find the closest ones (say within some
> radius, which may actually miss some!), and then for each of those nodes,
> check against MM million ways to make sure they aren't actually closer to
> another street. That's madness! A simple relation could tell you node X in
> way Y has the address number Z. (Obviously need a little more detail such as
> odd/even schemes to fully support interpolation).
>
> Karl
>

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