In line with http://en.wikipedia.org/wiki/Temperature#Temperature_scales I would strongly suggest the defaulti unit to be degrees Celsius. There is a technical problem with the units: Celsius "°C" and "°F" have the degree symbol "°", whereas the SI unit Kelvin "K" does not. Given the difficulty of finding the degree symbol on a normal keyboard, it may be wise do use "C", "F", and "K" when writing explicit temperatures in OSM. As far as the usefulness of the temperature key itself, i would say that only in few cases precise temperatures can be given, therefore any definition of the key should include the possibility to state approximate temperatures and approximate temperature ranges, even verbal and not only numerical, like "boiling", for example.
On 9 April 2015 at 09:02, johnw <jo...@mac.com> wrote: > > > On Apr 9, 2015, at 9:52 AM, Warin <61sundow...@gmail.com> wrote: > > > > Hi, > > I'd like an indication of the preference for the default unit of the > temperature= value > > > > > > Say a mapper tags > > > > temperature=42 > > > > The options are to interpret this as > > > > a) values would be interpreted as degrees Celsius. (Similar to the width > key default.) > > values should default to a known unit, like meters for elevation. > > I don’t enter m with an elevation value ( ele=3776 ), because the tag says > it is in meters. Even though I am an American and still think in > feet/inches/acres/miles, I read thr wiki and tag info in iD - which states > it is in meters. > > temperature should be the same. > > Get the tagging programs to display a note with the tag, and it is > super-easy to understand the unit for the tag. > > Javbw > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
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