[Tagging] [OSM-talk] Should we map things that do not exist?

Mateusz Konieczny matkoniecz at tutanota.com
Tue Jun 2 10:39:14 UTC 2020

Jun 2, 2020, 03:52 by c933103 at gmail.com:

> 在 2020年6月2日週二 09:26,Warin <> 61sundowner at gmail.com> > 寫道:
>> On 30/5/20 12:48 am, Volker Schmidt wrote:
>>  > My main point is that out there are things that consist of visible 
>>  > objects plus objects which have left visible traces, and also some 
>>  > pieces that have been completely erased, but of which we have 
>>  > documented knowledge of where they once were. The entire thing makes 
>>  > sense only with all its parts. These things be of interest for some 
>>  > end users of OSM data, and hence, if someone has gone to the length of 
>>  > mapping them, should find space in OSM.
>>  > In my view a general rule that any mapper can erase any object from 
>>  > the map, when he does not see any trace of it, is certainly not 
>>  > correct , he may be removing parts of the thing thsat only with all 
>>  > its partsmakes sense.
>>  Where an old railway line has been built over by houses, factories, 
>>  shops and roads I see no reason to retain the (historical) information 
>>  in OSM.
>>  The old railway station that still exists at one end - yes, but where 
>>  there is nothing, not even a hint, left then no.
> Except, it is relatively common for traces of old railway remain visible even after new development (e.g. house, factory, shop, road) have been made on top of their original site. So that cabnot be used as a criteria to determine whether that should be removed or not although the exact situation varies a lot in each individual cases.

Can you give an example (photos) where entire factory was constructed over former railway
and this section of railway remains somehow mappable in OSM?

With road I can easily imagine this, with a single small building I can also imagine special cases of
this remaining true.

But entire factory?
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