[Tagging] Permanent ID/URI --- off topic email

[Warin]

On 19/5/20 8:01 pm, European Water Project wrote:
> Thank you all for responding. I've commented in order
>
> Dear François & Jo,
>
> There are 240,000 drinking fountains  nodes (with the two tag forms) 
> tagged globally. Although, your suggestion seems a reasonable one, 
> unless there is master plan for unique id maintenance, I am loathe to 
> adding ref tags which might end up being poorly maintained stale 
> pollution.
>
> Dear Mateusz,
>
> If I understand correctly, I can query the database for historic data 
> states.  For how long is the historic data maintained ? Do all of the 
> servers below have the historic data ?
>
> 'https://lz4.overpass-api.de/api/interpreter';
> ' https://overpass-api.de/api/interpreter';
> 'https://overpass.kumi.systems/api/interpreter';
> 'http://overpass.openstreetmap.fr/api/interpreter';
> 'https://z.overpass-api.de/api/interpreter';
> 'https://overpass.nchc.org.tw';
>
> Dear Simon,
>
> What do you mean by  "+ version" ? Are you referring to a timestamp or 
> a something else ?

The version number.

See https://www.openstreetmap.org/way/173244595#map=18/-33.89163/151.27633

Way 173244595 is presently version 13. Version 1 would be when it was 
first created.

>
> For ways, which I am only starting to look to consider, maybe I could 
> look for objects with a similar geometric center for the replacement 
> object.
>
> Best regards,
>
> Stuart
>
>
> On Tue, 19 May 2020 at 11:41, Simon Poole <simon at poole.ch 
> <mailto:simon at poole.ch>> wrote:
>
>     It should be noted that (for Nodes) id + version is actually
>     stable (Ways and Relations are more complicated).
>
>     So if you have id + version, you can
>
>     - check that it is the current version of the object (all fine and
>     dandy)
>
>     - check if there is a later (undeleted) version, check if it
>     (depending on your criteria) is still the "same object", update
>     version in your reference
>
>     - if the last version is deleted or your criteria for it being the
>     same object doesn't hold, search in the vicinity for a replacement
>     object.
>
>     Doing the same for Ways and Relations requires including a
>     location reference of some kind as geometry changes are not
>     reflected in the versions, but can work in principle the same.
>
>     Simon
>
>     Am 19.05.2020 um 09:43 schrieb European Water Project:
>>     Dear All,
>>
>>     I am looking for a way to create permanent links  to specific
>>     objects (fountains and cafés) with images within our application
>>     ... and I have a couple of questions.
>>
>>     How quickly do OSM node and ways numbers mutate ?  What
>>     percentage should I expect to change each year.  If the
>>     percentage of ids mutates slowly enough .. maybe this is still
>>     the best bad short term option ?
>>
>>     I was pointed to this wiki :
>>     https://wiki.openstreetmap.org/wiki/Permanent_ID
>>
>>     On the discussion page, it is mentioned that a solution is being
>>     targeted for end 2020 . Will there be a tool to translate actual
>>     osm node and ways numbers to the new permalink ids.
>>
>>     Apparently Mangrove uses GEO URI to create perma links towards
>>     objects. https://en.wikipedia.org/wiki/Geo_URI_scheme. How do
>>     they deal with node repositioning ?  I could create a link name
>>     with first 5 latitude num followed by first 5 longitude num...
>>     but as soon as someone moves the node I would get a broken link...
>>
>>     Thanks for your help and advice
>>
>>     Best regards,
>>
>>     Stuart
>>
>>
>>
>>     _______________________________________________
>>     Tagging mailing list
>>     Tagging at openstreetmap.org  <mailto:Tagging at openstreetmap.org>
>>     https://lists.openstreetmap.org/listinfo/tagging
>     _______________________________________________
>     Tagging mailing list
>     Tagging at openstreetmap.org <mailto:Tagging at openstreetmap.org>
>     https://lists.openstreetmap.org/listinfo/tagging
>
>
> _______________________________________________
> Tagging mailing list
> Tagging at openstreetmap.org
> https://lists.openstreetmap.org/listinfo/tagging


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tagging/attachments/20200519/72f58551/attachment-0001.htm>