[Tagging] Power=cable for low voltage lines?

Warin 61sundowner at gmail.com
Tue Oct 16 08:45:25 UTC 2018

On 16/10/18 18:47, François Lacombe wrote:
> Le mar. 16 oct. 2018 à 00:20, Greg Troxel <gdt at lexort.com 
> <mailto:gdt at lexort.com>> a écrit :
>     So I don't see how we can make "insulated" a big deal in tagging,
>     defining the top-level tag, rather than being a detail to add when
>     known.

For me a single 'line' is one conductor, where as a cable will be more 
than one conductor.
Usually the difference can be seen at the ends - where a cable is split 
into the separate conductors.
High voltage things tend to be lines, cheaper I guess.

> I agree with both of you Greg and Marc
> Nevertheless, this was a debate in 2013 and I was in favor to merge 
> line, cable and minor_line
> https://wiki.openstreetmap.org/wiki/Proposed_features/Power_transmission_refinement#power.3Dminor_line_and_power.3Dminor_cable_replacement
> Due to power=cable and power=line usage in OSM, many contributors 
> didn't want to mass retag power=cable.
> Then we all agreed on line/cable distinction in late 2014 or 2015.
> https://wiki.openstreetmap.org/wiki/Proposed_features/Power_paths_refinement#Integrated_power.3Dcable
> Note that insulation is also a draft proposal
> https://wiki.openstreetmap.org/wiki/Proposed_features/Insulation_proposal
> I'm still opposed to minor_line since in merge several different 
> concept in one value, and is only useful for rendering.
>     That said, I fully support your notion of tagging voltage, so that
>     low-voltage lines can be rendered only at extreme zooms, and to
>     assume a
>     line is low voltage (240V seems like a reasonable default
>     assumption in
>     terms of controlling rendering) if not tagged.
> Great, should we open an issue on carto github to propose to lower the 
> rendering of cables without voltage?

Make a default value of 240 v for lines that have no voltage tag?
That would work and motivate some to add the voltage tag.

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