On 31/07/19 20:28, Paul Allen wrote:
On Wed, 31 Jul 2019 at 08:35, Warin <61sundow...@gmail.com
<mailto:61sundow...@gmail.com>> wrote:
Err the wiki could state the default is kW.
There is no present default unit for power - see
https://wiki.openstreetmap.org/wiki/Map_Features/Units#Default_units
Adding a default would be good, and kW is probably the most
universal in this case, but for power generation MW is more universal.
There have been sporadic discussions here about mapping the
availability of USB charger
outlets. A default of kW doesn't suit everything.
USB outlets are typically specified by the current capability. So I
would not tag power on them but current.
Say, current=0.5 A or current=2.1 A .. where A stands for Ampere.
But, assuming we agree that SI multipliers
can be used, then sure, kW is a reasonable default. I would also
propose that any value
that defaults to any SI unit should allow SI multipliers.
And the wiki could also state that a space is required between the
numeric values and the units, if any.
This is the case for all other units so the convention should be held.
It is certainly desirable that a space be there (in non-monospaced
fonts, a good typographer
would insert a thin space rather than a full space, this does conform
to SI requirements for
spacing). However, people are fallible and may omit the space for
many reasons (didn't
read the documentation, typo, etc.). It would be nice if editors (at
a minimum, it could be
applied to other steps in the chain too) applied Postel's robustness
principle: "Be conservative
in what you send, be liberal in what you accept." I.e., an editor
would allow a user to enter
"7kW" but would upload it as "7 kW." Some editors already strip
superfluous spaces from
values (of any kind) so this would not be a drastic break from what
they currently do.
+1
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