Update: comments pointed out that such edits are against the code of conduct, even if not automated. I leave this post just as personal hint on queries and regexp’s.

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It happens there’s a lot of OSM tags “ele”=” m" that can't be processed by useful queries like [find volcanoes between 1000 and 2500 meters high](http://overpass-turbo.eu/s/wXw)

How I remove unit of measure:

• download faulty data with this generic overpass-turbo query

• from export menu, “download/copy as raw OSM data”

• load resulting .osm file in Notepad++ (or whatever regexp editor)
• find&replace (CTRL+h) twice with the following fields:
  find: k=”ele” v=”(\d+(.\d+)) m” will find for example “450.5 m”
  replace: k=”ele” v=”$1” will replace “450.5”
  find: k=”ele” v=”(\d+) m” will find for example “450 m”
  replace: k=”ele” v=”$1” will replace “450”
• load in JOSM modified .osm file
• select all (CTRL+a) and add a fake tag (ie: pippo=pluto) to every node and remove it (just a shortcut to add “modify” tag to elements, otherwise you won’t be able to upload anything

Remember to add proper changeset comment.