[Tagging] Meaning of check_date

[Mike Thompson]

I agree with you, check_date=* means (or should mean) that all information
was checked on the specified date.  The danger here is that some
streetcomplete user adds some minor information, such as lit=no (I thought
that was the default and that no tag was needed), and indicates that a
highway still exists, but they didn't check that max_speed=* is now 35 mph
and not 25 mph, that last year an additional lane was added, that
surface=concrete instead of asphalt after some repaving last month, etc.
Mike

On Mon, Aug 2, 2021 at 2:49 PM Raphael <dafadllyn at gmail.com> wrote:

> Dear fellow mappers,
>
> StreetComplete sets a check_date=* tag if a user answers a "Is this
> [feature] still here?" question with "yes". However, the wiki entry
> for check_date=* [1] says:
>
> > Date of latest review of the data [...] The tag is intended to document
> the last date, when an object as a whole or specific tags of the object
> were checked and verified. [...] To indicate the review of specific tags
> the key is built from multiple words separated by colons like
> check_date:collection_times=* or check_date:opening_hours=*. [...]
>
> It is clear to me that check_date=* means that all properties (or at
> least all that are verifiable on site) were checked on that date, not
> only its existence. Besides, there is no other tag with the meaning
> "everything last checked on" while there there are tags for "existence
> last checked on" and adding the same number of check_date:<property>
> tags as a feature has tags seems impractical.
>
> (For example, when used for a shop=* with opening_hours=* or an
> amenity=post_box with collection_times=*, i expect
> check_date=2021-07-31 to mean that it's opening hours or collection
> times, respectively, have been last checked on 31 July 2021 too, not
> only its existence, also because this information changes more often
> than its existence.)
>
> Therefore, i think that another tag should be used for the date on
> which a feature was last checked for existence. However, the developer
> of StreetComplete thinks that this is the meaning of check_date=*. [2]
>
> How do you understand check_date=*?
>
> (And if you think that check_date=* only means "existence last checked
> on", how would you tag "object as a whole last checked on"?)
>
> Best regards
>
> Raphael (dafadllyn)
>
> [1]: https://wiki.openstreetmap.org/wiki/Key:check_date
> [2]: https://github.com/streetcomplete/StreetComplete/issues/3110
>
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