<html dir="ltr"><head></head><body style="text-align:left; direction:ltr;"><div>On Tue, 2020-05-19 at 09:43 +0200, European Water Project wrote:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><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">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">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></div></div></blockquote><div><br></div><div>I think that will depend very heavily on what the object is. Something like a drinking fountain that is mapped as a single node and is too small to be improved into a way will be quite stable as there is no reason to improve it.</div><div><br></div><div>Other nodes may change, shops/pubs/restaurants mapped as nodes can obviously be improved and the tags transferred to a building object.</div><div><br></div><div>Although relying on a node id is not the best way, something based on maybe overpass that finds the tags seems a far more stable way to me.</div><div><br></div><div>Phil (trigpoint)</div></body></html>