[Tagging] still_visible_on=* or maybe still_visible_in=?

Martin Koppenhoefer dieterdreist at gmail.com
Wed Jun 27 13:52:53 UTC 2018

2018-06-27 15:38 GMT+02:00 Mateusz Konieczny <matkoniecz at tutanota.com>:

> Sometimes it makes sense to do not fully delete OSM elements representing
> completely
> destroyed objects.
> For example, completely destroyed road should not be present in OSM, but
> it may make sense
> to keep destroyed:highway=service until it is not visible on various
> aerial images to avoid remapping
> it by armchair editors.

Generally I agree it can be helpful to state for a transition time that
something is gone but still visible in common aerial imagery.

What is a "completely destroyed road"? Can there still be the roadbed?
Drainage system / remains? Much more common than something vanishing
completely is partial removal or decay. Often, traces remain. We should
also raise awareness in this regard, so that people consider their options
carefully after discovering a discrepancy between the ground reality and
our map.

For a very specific use case there is natural=tree_stump which can often be
a good choice to convert a natural=tree into, after it was cut. But it
isn't suitable if they removed the stump as well (encountered this just 2
days ago).

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