[Tagging] tagging for decaying features

[Warin]

On 04-Jan-18 09:04 PM, Martin Koppenhoefer wrote:

>
> sent from a phone
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>> On 3. Jan 2018, at 23:06, Warin <61sundowner at gmail.com> wrote:
>>
>> I have moved some disused:railway=* from OSM to OHM as railway=* with start and end dates .. that records what was there then, not its present state ...
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> disused:railway is about something that is there (a disused railway element like tracks or a station), abandoned:railway is also about disused railways, but in a state of degradation (e.g. trees growing between the tracks). razed railways would typically not be mapped in osm, as they are no longer there.

Agreed. Unfortunately there are one or two mappers that misuse the tag disused: for railways that are well beyond the OSM definition of disused.
That is the individual case I am trying to deal with, it has various states of its last life.

> IIRR there is also the proposed concept of dismantled railways where the tracks are removed but it is still perceivable as former railway (e.g. embankments and tunnels, bridges). While disused and abandoned are states that are not disputed for inserting in osm (afaik), dismantled and razed are. Personally I’d accept dismantled railways as long as there is something, even if it requires additional knowledge or experience to understand that what you see is a former railway.
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_Ruined_  says there is something of the original structure left - for a railway track this might be the occasional single track, some groups of sleepers.


Where there is something that indicates the past presents of a railway track, say ballast, embankment or cutting (or some other feature will have different indicators) .. perhaps '_vestige_' ??___Dismantled_,_demolished_  and_razed_  have different meanings about how a thing was made absent. None says anything about what remains.

I had not though of this before your post, thanks.
_Absent_  says there is nothing there of the original thing - or even if there was anything there.



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