On 5/27/2012 1:51 PM, Russ Nelson wrote:
Nathan Edgars II writes:
> I'm considering using http://wiki.openstreetmap.org/wiki/Key:start_date
> and end_date for some railways, but there seems to be too much
> ambiguity. First, if it's now a highway=*, I'd use start_date:railway
> for when the line opened. But on a railway=disused, wouldn't this be
> when it started to be disused? And on a railway=preserved, you'd
> definitely want to know both when the line first opened and when the
> current tourist operation began. With end_date, there's also ambiguity
> for an abandoned line - should it be when the line last saw service (if
> known)?
You're over-thinking this, Nathan. Think about it from a mapper's
perspective. start_date should be the date it first became a
railway. end_date should be the date it ceased to be a railway (that
is, the tracks were removed).
Why when the tracks were removed? What if a bridge was washed out and
the tracks beyond were left to rust?
And you don't need start_date:railway, because you've already created
a relation for most every railway, so put start_date on the relation.
This only works if the entire line opened at once, which is only true
about half the time.
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