<div dir="ltr">If the fountains don't have identifiers that are suitable for ref, you may be able to add them to wikidata (if they are 'notable' enough for that project and you have permission to add them to a cc0 licensed project). You can only do that for fountains that YOU have added yourself though, you can't add them to wikidata if someone else mapped them, due to license incompatibility between ODBL and cc0.<div><br></div><div>Polyglot.</div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, May 19, 2020 at 11:41 AM Simon Poole <<a href="mailto:simon@poole.ch">simon@poole.ch</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div>
<p>It should be noted that (for Nodes) id + version is actually
stable (Ways and Relations are more complicated).</p>
<p>So if you have id + version, you can</p>
<p>- check that it is the current version of the object (all fine
and dandy)</p>
<p>- 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</p>
<p>- 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.</p>
<p>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.<br>
</p>
<p>Simon<br>
</p>
<div>Am 19.05.2020 um 09:43 schrieb European
Water Project:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Dear All,
<div>
<div><br>
</div>
<div>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. <br>
<div><br>
</div>
<div>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 ? </div>
<div><br>
</div>
<div>I was pointed to this wiki : </div>
<div><a href="https://wiki.openstreetmap.org/wiki/Permanent_ID" target="_blank">https://wiki.openstreetmap.org/wiki/Permanent_ID</a> </div>
<div><br>
</div>
<div>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. </div>
<div><br>
</div>
<div>Apparently Mangrove uses GEO URI to create perma
links towards objects. <a href="https://en.wikipedia.org/wiki/Geo_URI_scheme" target="_blank">https://en.wikipedia.org/wiki/Geo_URI_scheme</a>.
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... </div>
<div><br>
</div>
<div>Thanks for your help and advice</div>
<div><br>
</div>
<div>Best regards,</div>
<div><br>
</div>
<div>Stuart </div>
<div><br>
</div>
<div><br>
</div>
</div>
</div>
</div>
<br>
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