On Tue, 2020-05-19 at 09:43 +0200, European Water Project wrote: > 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...
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. Other nodes may change, shops/pubs/restaurants mapped as nodes can obviously be improved and the tags transferred to a building object. 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. Phil (trigpoint)
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