Am Samstag, 20. Juni 2015, 23:13:04 schrieb Peter Reinhart:
Dear fellow railway mappers,
there is a current Github issue with the OpenRailwayMap that I believe
is quite worth to be debated. It is on the question if railway signals
should no longer be rendered when there is no direction tag attached to
them.
I'm now hijacking this discussion, because I think it matches my "issue"
pretty close.
I would like to have a better tagging for "2 or more signals at the same
pole". Think of the German snowplow signal as a reference: in all cases where
I have seen this signal it shows up and down on the same pole, just for
opposite directions. There is currently no way to reflect this in the tagging,
one needs to use 2 nodes for this (which I dislike for various reasons).
Another example are H/V light signals where a main and distant signal is at
the same pole. Those often have signs where the ref is written as "G/pII" [1].
You do not need much guessing to find out that "G" is the ref of the main
signal, while "pII" matches the distant one. There is however no way one could
reflect this in the tagging, either.
So if anyone comes up with a good idea how to increase the tagging for those
without breaking everything we already have: just speak up.
For the "ref" I could imaging adding additional railway:signal:main:ref=G and
railway:signal:distant:ref=pII, but this duplicates information we already
have in the database. A way out could be to say: if there are multiple signals
on one pole that could have refs use the "long" form, otherwise "ref"
is
sufficient. But that sounds hacky to me.
Greetings,
Eike
1) side note: the II are actually smaller and written in superscript, I have
no idea how to properly write that down