[Tagging] Discouraging frequency=* on power lines and cables
61sundowner at gmail.com
Wed Mar 8 21:55:27 UTC 2017
On 09-Mar-17 03:19 AM, François Lacombe wrote:
> Hi Tom,
> 2017-03-08 16:08 GMT+01:00 Tom Pfeifer <t.pfeifer at computer.org
> <mailto:t.pfeifer at computer.org>>:
> The wiki documents for what particular tags are for. This tag is
> used 826577 times, so this documentation is essential.
> Also, we normally do not delete wiki pages at all. The process
> would be to discourage or deprecate the tag, however the reasons
> you gave above are very weak for me.
> My point wasn't to delete any page but to remove frequency=* as a
> possible tag for power lines.
> frequency=16.7 is used a lot on railway networks where it is
> clearly distinguished from the 50 (Europe) or 60 (America) Hz
> regular energy distribution.
> frequency=0 (used on 35% of the tags) means DC power which is used
> on specific railways, and could also apply to DC distribution
> networks that I vaguely remember are constructed differently from
> traditional 50/60Hz-Networks.
> I didn't say frequency isn't used but it is actually misused.
> Frequency refers to power routes, not physical power lines
While the lines themselves don't have a frequency (well there are limits
as to what they will take) themselves, as you say the supporting
infrastructure (transformers, generators etc) have a nominal frequency.
If you want include a statement that power distribution lines themselves
do not require a tag of frequency but relationships that have those
lines as members should have a tag of frequency?
Is that what you are after? Do remember that the wiki is a guide, not
rules... try not to be pedantic.
> Example :
> A 400 kV 50Hz route : http://www.openstreetmap.org/relation/6359644
> Which has lines as members : http://www.openstreetmap.org/way/41773490
> http://www.openstreetmap.org/way/41828020 where frequency isn't mentioned.
> If a 16.7 Hz line would have shared same sections, the relation would
> have frequency=16.7 and line sections wouldn't.
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