[Tagging] Let's get (quite) rid of units and their multiples in OSM values

[François Lacombe]

Hi all,

Yet another discussion about values with units in the database.
In particular situations of keys implying particular units (like voltage=*
with Volt), would it be good to improve tools, editors, websites or any
other stuff dedicated to human reading to get voltage=400000 displayed as
voltage=400 kV ? (example given)

Because using raw voltage=400 kV in the db prevent queries like
[voltage>20000] to be successful.
Then store voltage=400000 is far way better but harder to be read by humans
also.

https://wiki.openstreetmap.org/wiki/Map_Features/Units doesn't help
regarding such issues.

In practice, valid units could be put on keys wiki pages, collected by
taginfo and spread to any tools aiming to display formatted values.

I don't want to break things but only improve them, all the best

François
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