Background is a issue asking to render this in OpenRailwayMap: https:// github.com/OpenRailwayMap/OpenRailwayMap/issues/755
Everything following is just my understanding of the German Wikipedia article, I don't have any original knowledge about these things, so please correct me if I'm wrong.
So, previously we had the "LZB-Blockkennzeichen" (LZB block marker) in Germany, which has been renamed to just "Blockkennzeichen" (block marker) in 2012. This is a black circle on a white square sign, with the block number inside the circle: https://wiki.openstreetmap.org/wiki/File:LZB-Blockkennzeichen.jpg
A new version which comes from the ETCS world is just a black arrow on a white square sign, with the number on a separate sign below it. This is basically a monochrome version of the ETCS stop marker: https://upload.wikimedia.org/ wikipedia/commons/thumb/e/e8/Blockkennzeichen_alleinstehend.jpg/220px- Blockkennzeichen_alleinstehend.jpg
From what I can see these signs are basically identical in meaning, and there exists no tagging for the new version of the sign. I think it was a genius idea to add the ":shape" subtag (*cough* *g*), and this could be easily used here:
railway:signal:train_protection=DE-ESO:blockkennzeichen railway:signal:train_protection:shape=circle
or
railway:signal:train_protection:shape=arrow
For the time being we must treat a missing :shape for the German signal as "circle".
Afterwards we can start adding a rendering for this, which should be easy as it's just a copy and color change of the "ETCS stop marker" image.
Part 2:
Since this signal comes from the ETCS world it is likely in use outside of Germany already, the German wiki page e.g. refers to Swiss "ETCS- Standortsignal". The question is: how is the tagging of this type of signal in other countries? Do they also use different shapes or does only the arrow form exist there? Would be nice to know as that could be added to the rendering rules at the same time.
Regards,
Eike
Am 30.12.21 um 11:08 schrieb Rolf Eike Beer:
From what I can see these signs are basically identical in meaning, and there exists no tagging for the new version of the sign.
Correct. The meaning of these signs is identical. The new variant is the European standardized one (EN 16494).
I think it was a genius idea to add the ":shape" subtag (*cough* *g*), and this could be easily used here:
railway:signal:train_protection=DE-ESO:blockkennzeichen railway:signal:train_protection:shape=circle
or
railway:signal:train_protection:shape=arrow
For the time being we must treat a missing :shape for the German signal as "circle".
Afterwards we can start adding a rendering for this, which should be easy as it's just a copy and color change of the "ETCS stop marker" image.
It differs a little bit - the arrow has no border, but the board itself has one: https://kuemmling.eu/orm/ETCS_location_marker_left_side.svg
Part 2:
Since this signal comes from the ETCS world it is likely in use outside of Germany already, the German wiki page e.g. refers to Swiss "ETCS- Standortsignal". The question is: how is the tagging of this type of signal in other countries? Do they also use different shapes or does only the arrow form exist there? Would be nice to know as that could be added to the rendering rules at the same time.
I'm not sure whether there exist any standardized ETCS location markers outside Germany yet.
Location markers in another non standardized variant (white triangle on blue board) exist on some high speed lines in Italy (e.g. Bologna - Firenze).
Regards, Micha
Op 30 dec. 2021 om 22:49 heeft Michael Kümmling michael@kuemmling.eu het volgende geschreven: Am 30.12.21 um 11:08 schrieb Rolf Eike Beer:
From what I can see these signs are basically identical in meaning, and there exists no tagging for the new version of the sign.
Correct. The meaning of these signs is identical. The new variant is the European standardized one (EN 16494).
While the usage is similar, there is an actual difference. A colleague from the signalling department pointed me to Technical Document 011REC1053 from the European Railway Agency, which contains an annex that conveniently points it out:
From these figures (and section 5.1 of the main document) it can be derived that the difference between stop markers (Haltsignale) and location markers (Standortsignale) can be used to indicate the function of an End Of movement Authority (EOA), comparable with: railway:signal:*:function=* Stop markers are used for entry signals and exit signals, whilst location markers can be used for intermediate signals and block signals.
Not all operators (countries) make use of the distinction between location markers and stop markers though. At least The Netherlands, Belgium, France, the United Kingdom and Spain just use stop markers for all EOAs. It appears DB Netz and SBB insisted on distinguishing EOA functions and thus began implementing location markers.
We could tag German location markers as: railway:signal:train_protection=DE…… railway:signal:train_protection:type=block_marker railway:signal:train_protection:function=block/intermediate
openrailwaymap@openrailwaymap.org
-
Jeroen Wegdam -
Michael Kümmling -
Rolf Eike Beer