The work started in 2018 about lines attachments/management has reached a new step.
I propose line_arrangement=* to document how (power) lines cables are arranged and RFC for this proposal is now open.
It mainly covers overhead power lines but underground cables and telecommunication lines as well. https://wiki.openstreetmap.org/wiki/Proposed_features/Lines_arrangements
It aims to provide a global set of values to complete what is currently done with design=* specifically in each world regions.
It doesn’t change nor replace existing tagging, only creating a new key with 7 values.
Let’s discuss it there or on Talk page, best regards.
From the point of view of a data consumer without any specialist knowledge about power infrastructure: Is it possible to use this proposed key, along with the existing ones, to unambiguously figure out where to place (bundles of) cables in a 3D rendering? If so, how would I best approach this?
At the moment, I only have a rather old implementation – originally created by @Peda – which doesn’t take many of the more recent tags into account.
That’s a good question I could answer in the proposal as well.
3D rendering will give best results with combination of line_arrangement and design.
Design will bring dimensions of tower model and arrangement will disambiguate how lines arrange around each support.
Some designs may allow several different arrangements. For instance two-level, delta_two-level, delta_three-level, portal_two-level can all support horizontal or triangular arrangements.
We could start implement more accurate 3D rendering when this key will have been reviewed.
I’d add that transitions between arrangements are difficult parts. Currently nothing allows to document how bundles continues between different arrangement sections.
It could be defaulted for common cases and specialized with line_management=transpose and few more tagging remaining to be defined.
Sorry to reply here but the wiki blocks creation of accounts with open proxies. I’m allowed to create an OSM account and edit the map… Whatever, as long as someone reads this…
Above picture is at Jersey Avenue in New Brunswick. At the top are two different regular circuits (“Deans-Linden” and “Deans-Aldene”); below those are 4 25Hz split-phase 138kV lines. 14 conductors, 6 circuits, two poles, two operators, two different frequencies.
I figured this might be a good example for the example page.
