[OHM] Time tagging...

[Jeff Meyer]

Paul - thanks! That's very helpful. I'm sure we'll revisit this topic
moving forward, but for now, that's very good to know. Thanks, Jeff

On Fri, May 18, 2018 at 12:19 PM, PauLL170 <bilbo.beuthel at gmail.com> wrote:

> Hi,
>
> "1954..1973" means the object first appeared at an unknown date between
> 1954(-01-01) and 1973(-12-31). I mentioned the ".."-format in my mail from
> May 8 in the old thread. If we focus upon the ".."-format (I advocate this
> at the moment) start_date=1910 means start_date=1910-01-01..1910-12-31.
>
> "before 1904" means that 1903 is the oldest verifiable date for that
> object (see https://wiki.openstreetmap.org/wiki/Key:start_date#
> Approximations). So it could have first appeared between the beginning of
> time and 1903-12-31. So it means "[oldest date we technically take in
> consideration (like 4,57 billions of years)]..1903-12-31".
>
> Best regards,
> Paul
>
>>
>>
>


-- 
Jeff Meyer
206-676-2347
osm: Open Historical Map (OHM)
<http://wiki.openstreetmap.org/wiki/Open_Historical_Map> / my OSM user page
<http://www.openstreetmap.org/user/jeffmeyer>
t: @OpenHistMap
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