Proposal talk:Railway:signal:height

Mismatch in compatability

I see this is already included in OpenRailwayMap/Tagging/Signal#Additional_Properties, still:

1. height=* is used for numbers everywhere else. Not a good idea to mix formats, especially when orthogonal.
2. *=dwarf and *=normal are ambiguous when there are different systems, including different specs in the same company.

Alternative: location=* is already used for relative vertical positions. Seems they would already covered by railway:signal:location=overground and railway:signal:location=overhead
--- Kovposch (talk) 11:00, 13 March 2022 (UTC)

The "normal" and "dwarf" values are already used to tag signals for quite a while, just in other subtags like railway:signal:main:height. location=* doesn't seem to fit here, basically all signal positions are railway:signal:location=overground, and there is seldomly a roof for railway:signal:location=overhead. This proposal is just about a new key for the already existing tagging scheme. --Dakon (talk) 20:10, 4 November 2022 (UTC)

Then you can change to railway:signal:location=dwarf. *:height=* is still a mistake. OpenRailwayMap/Tagging/Signal says "Alternatively, you can specify the exact height measurement." .This is means they are orthogonal. Adding one info prevents the other from being added, which railway:signal:location=dwarf + railway:signal:height=1 would otherwise allow. --- Kovposch (talk) 06:46, 5 November 2022 (UTC)

I don't mean "roof" for railway:signal:location=overhead. They can be gantries. --- Kovposch (talk) 06:47, 5 November 2022 (UTC)

@Kovposch: Do I understand you right that you prefer location over the existing height because height makes people expect numbers (height in meter)?

The reason why the existing tagging schema uses such a tag at all, is that dwarf versions sometimes differ in their shape or size because they are mounted very close to the ground (often below the structure gauge).

If a signal pole has a main, a speed and a shunting signal, currently mappers have to add three tags for the height. If all signals are at normal height or all are at dwarf height (the latter is rather strange except if multiple signals like main and shunting are combined in one signal), using one tag instead of three makes tagging easier and removes the duplication from railway signal tagging (there are valid complaints about this).

I will improve the wording of the proposal and add pictures to make it easier to understand. --Nakaner (talk) 20:17, 26 November 2022 (UTC)