[OSM-talk] OSM relation ID property in Wikidata

[Stefan Keller]

2013/5/7 Peter Wendorff <wendorff at uni-paderborn.de>:
> Look what happens in OSM all the time: POIs are moved slightly to match
> aerial images - following your definition that should be another ID now

No, That's one of the nice properties of ids without coordinates!
To me it would remain the same - except when a tool or the user is
fooling the concept.
At least the tools you can debug.

Yours, Stefan

2013/5/7 Peter Wendorff <wendorff at uni-paderborn.de>:
> Am 07.05.2013 09:58, schrieb Stefan Keller:
>> Hi,
>>
>> You wrote:
>>> - it's roughly in that bounding box (e.g. the city or a given part of
>>
>> A soon as you use the word "roughly" - the id approach is doomed to fail.
>> According to OO and database technology an id is a well-defined
>> surrogate with a well-defined data type.
>
> Then it's not the same "permanent" we talk about.
> Look what happens in OSM all the time: POIs are moved slightly to match
> aerial images - following your definition that should be another ID now
> - but that's not what people usually want if they request for a
> permanent ID, similar to changes from node to polygon to multipolyogn etc.
>
> "It's in that bounding box" nevertheless would have been the better
> wording, (equalling "is roughly at that position, so if you want to use
> roughly/estimation, it's possible even then).
>
> regards
> Peter