[Tagging] still_visible_on= or maybe still_visible_in=

Warin 61sundowner at gmail.com
Wed Jun 27 23:33:55 UTC 2018

 From subject [Tagging] still_visible_on=* or maybe still_visible_in=?

On 27/06/18 23:55, Richard Welty wrote:

> On 6/27/18 9:52 AM, Martin Koppenhoefer wrote:
>> 2018-06-27 15:38 GMT+02:00 Mateusz Konieczny <matkoniecz at tutanota.com
>> <mailto: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).
> i would tend to use the existing disused: namespace for things that are
> disappearing.

Disused is for things that are still present and can be reactivated with little effort.

If it is gone .. then it is not there.

I would use the source= tag to stipulate the source of where the information comes from, and if necessary to state that imagery from other sources are out of date at this time.
I have done this a few time. I have even had to do it on stuff i started to change to map imagery .. only to discover other imagery had the presently maped stuff on it.
Use that source key. It really helps other mappers.

Note on subject line ...
It looks like various characters are not liked in these subject lines .. the same characters not liked in file names.
So I have taken out those characters in the subject line.. sorry to break the thread.

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