[OSM-talk] What3words

[Colin Smale]

True, they admit the 3D aspect cannot be handled at the moment. They
tend to emphasise the opposite: one building with a single address, but
multiple entrances; they can each have an individual w3w. 

On 2015-11-23 10:43, Martin Koppenhoefer wrote: 

> 2015-11-22 15:32 GMT+01:00 Colin Smale <colin.smale at xs4all.nl>:
> 
>> You argument about being able to derive the w3w from the geometry is valid, but requires the use of the proprietary API. But as you mention their resolution is 3m, and I have seen discussions where people point out that their house falls into multiple squares so there is not a single translation from a building to w3w. ...
> 
>> By the way, just to be absolutely clear, I am not thinking of w3w as a coordinate system in OSM, but as an addressing attribute similar to postcodes.
> 
> it clearly is a coordinate system and not an addressing system. Addresses adopt to the requirements, this system doesn't. Addresses are unique (at least in the areas I know), this system can't guarantee it. If there are 2 doors side to side falling into the same grid square 3x3, they will get the same "address" (coordinates) in w3w, despite having actually distinct addresses (this is how addressing works in Italy, one address for every entrace). 
> 
> cheers, 
> Martin
 
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