[Tagging] start_date variants

[Tobias Zwick]

Sounds solid and already used quite a bit.

But wait, is it start_date:somekey or somekey:start_date?

Tobias 

On February 15, 2019 11:03:01 AM GMT+01:00, "Stephan Bösch-Plepelits" <skunk at xover.mud.at> wrote:
>Hi!
>
>I have some thoughts in the start_date tag, as I find it a bit too
>vague -
>meaning start of what?
>
>Example: There is this museum, which openened in 2011, but the building
>is
>much older, it was built in 1725:
>https://www.openstreetmap.org/relation/1937535
>
>An option would be to prefix start_date with the key of the indicating
>tag,
>e.g. amenity:start_date would describe the start_date of the current
>amenity. So, non-prefixed start_date would apply to all other tags.
>
>This seems to be quite popular anyway, but I don't know if this ever
>has
>been agreed upon - at least it's not documented as such:
>https://taginfo.openstreetmap.org/search?q=start_date
>
>For the museum, which I mentioned before, I used the following tags:
>- start_date=2011
>- building:start_date=1725
>
>Other remarks:
>
>It would also be interesting to be able to tag the start of
>construction -
>often construction starts many years before the building is finshed:
>Airport BER in Berlin, Germany or La Sagrada Familia in Barcelona,
>Spain
>are famous examples. How to tag this? Maybe: construction:start_date?
>
>Any thougths on this?
>
>greetings,
>	Stephan
>
>PS: OpenStreetBrowser has a category which shows building:start_date
>resp.
>start_date:
>https://www.openstreetbrowser.org/#categories=buildings-start_date
>
>PS: I even found, that people translate 'start_date' by using a
>language
>suffix (e.g. start_date:fr, start_date:ja):
>- https://taginfo.openstreetmap.org/keys/start_date%3Afr#values
>- https://taginfo.openstreetmap.org/keys/start_date%3Aja#values
>I wrote a node module which can translate start_date values (English,
>German, French available). Pull requests welcome!
>https://github.com/plepe/openstreetmap-date-format