[openrailwaymap] Life cycle tags vs. current state

[Denis Stein]

Dear all,

when checking several maps in Germany, I found an area containing 
remnant after reconstruction (node [1] and adjacent ways; find attached 
also a sketch in a PDF file) where the tagging is not yet ideal 
(besides, e.g., railway:switch=default vs. 4 edges; upper right track is 
not rendered on openstreetmap.org due to tagging), but I do not have 
enough local and temporal knowledge.

I subsequently assume that the Bing aerial image shows the current state 
with a probably removed diamond crossing with slips (einfache/doppelte 
Kreuzungsweiche) and some rails nearby.

Probably, this is no problem for routing since tracks, which are tagged 
as abandoned or disused, might be ignored.

Considering the use of the map for environment perception and 
localization (for research purposes; using OSM where one can quickly 
obtain a map from any space) the train can use neither the lower left 
nor the upper right track without derailment, since there is no physical 
connection any more. But, both ways are still connected to this centre 
node. Infering non-existence of switches from missing switch-tags is not 
a proper solution, since in most case there is a switch, but not yet a 
corresponding tag.

For such special places I would prefer the lower tagging in my sketch 
splitting both unusable ways in a shorter abandoned part and a disused 
part taking also into account the past (using correct life cycle tags).

How would you tag this scenario (assuming time and attention to detail)?
What arguments are opposing my proposal?

I am looking forward to receiving your helpful comments. Many thanks in 
advance!

Kind regards,

Denis.

[1] <https://www.openstreetmap.org/node/1238528586>

-- 
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Dipl.-Inf. Denis Stein
Research Scientist
Research Division ISPE | Research Department MPS

FZI Forschungszentrum Informatik
Haid-und-Neu-Str. 10–14
76131 Karlsruhe, Germany

Tel.: +49 721 9654-276

stein at fzi.de
www.fzi.de/mitarbeiter/stein

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FZI Forschungszentrum Informatik am Karlsruher Institut für Technologie
Stiftung des bürgerlichen Rechts
Stiftung Az: 14-0563.1 Regierungspräsidium Karlsruhe
Vorstand: Prof. Dr. Andreas Oberweis, Prof. Dr. Ralf Reussner,
Jan Wiesenberger, Prof. Dr.-Ing. J. Marius Zöllner
Vorsitzender des Kuratoriums: Ministerialdirigent Günther Leßnerkraus
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