Hello mappers,
I’m looking for a list of all deprecated tags related to new tags to search on a large region so I can change them and notify mappers who have recently used it that the tag has changed or been dropped. This would also allow to update the map (I promise, no mass edit).
If it doesn’t exist, any idea to create it?
Thank you!
I would kindly suggest that you 1st read up on the concept of deprecation in OSM (and its misuse of late) before you start doing what you are proposing, otherwise you might be quite surprised by the reactions.
A list is maintained by iD maintainers here:
These are used for the “upgrade this feature” functionality in iD.
Unluckily that list has major bloopers in it and has never been vetted. Wit for example
{
"old": {
"amenity": "dancing_school"
},
"replace": {
"leisure": "dance",
"dance:teaching": "yes"
}
},
True, but then again, nothing is perfect. But it is not so bad overall (i.e. most of it makes sense).
Interested parties should consult multiple sources and decide that something is really deprecated only if many of them agree. So iD, JOSM, wiki of the tag, its talk page, accepted proposal for deprecation, tagging ML / forum discussions etc.
If only one claims something is deprecated, that should be taken with huge grain of salt.
For interested parties, that specific issue is being tracked at Revert deprecation of amenity=dancing_school · Issue #373 · openstreetmap/id-tagging-schema · GitHub
So I can’t use the wiki as source ?
In general JOSM validator has reasonably quality of reports - but typically cases where deprecation was useful are ambiguous and require resurvey.
https://josm.openstreetmap.de/browser/josm/trunk/resources/data/validator/deprecated.mapcss
You can but note that wiki could be changed few minutes ago with someone who loves deprecating things but skips part like “consult others” or “check the situation”, so you may need to verify claims.
What goes into the Wiki is not vetted. In regular intervals, over-eager individuals take it upon themselves to “improve” the Wiki and “clarify” things without consultation, creating misleading or plain wrong information. Even when there is a “vote” on something, it’s usually just 20 or 30 people voting, compared to thousands who might be using a tag. That’s why you need to be very careful. You can certainly ask someone whether they are using tag X for a particular reason now that tag Y is a more common expression of the same concept. But any wording that implies their tagging is “outdated” or even “wrong”, or that they need to change because the Wiki says so, is certain to meet with opposition - especially if you are not a frequent user of the tag in question yourself and lack any subject matter knowledge!
One thing that you can do with a list of “deprecated” tags is to look for data consumers who are looking at the “old” form of a tag but not the “new” one.
Taginfo.osm.org has a “projects” tab where you can see what projects handle what tags. If the “new” tag is seeing significant usage and they are not aware of it it might be helpful to let them know that it exists.
Of course, there may be reasons why a particular data consumer does not want to use a particular tag - if that project has an issues list at e.g. GitHub you could see if it has already been mentioned.
Thanks for raising this again. 
It will now be finally resolved with #814 and use amenity=dancing_school for Dance Studio, add field for dance:teac… · openstreetmap/id-tagging-schema@2e88d1b · GitHub.
Be aware though that this list covers only some project using the tag - do not assume that if a tag is listed there by only say 3 projects that there are only 3 projects using that tag (i.e. it only means that there are no less than 3 projects using it. There could 30 or 300 of projects using it)
Absolutely - there are some very significant omissions. For example, only one of the six renderers at osm.org are listed, I think.