There is no regional default if the units are not specified. In the case of maxspeed it is always km/h if the units are not specified. If mph is intended then "mph" must be specified. http://wiki.openstreetmap.org/wiki/Key:maxspeed
So, for your example of temperature, if the units are not specified then the value should be interpreted as, say, Celsius. If a mapper intends the units to be Fahrenheit then they must include a unit identifier *regardless of the physical location of the tag*. -- Andrew On 9 April 2015 at 15:42, Warin <[email protected]> wrote: > Sorry .. I have not made that clear .. > > The default speed limit for motorways on OSM in, say, Australia would be > taking regionally, while that for USA would be different and taken for that > region? > > See http://wiki.openstreetmap.org/wiki/OSM_tags_for_routing/Maxspeed ? > > > On 9/04/2015 4:16 PM, Lukas Sommer wrote: > >> b) values would interpreted by region. Most of the world would be >>> Celsius, USA would be Fahrenheit. (Similar to defaults for speed on roads.) >>> >> Please note that speed limits are _not_ interpreted by regions. >> http://wiki.openstreetmap.org/wiki/Key:maxspeed states that the unit >> has to be added explicitly when it’s not km/h – independent of the >> region where you are mapping. >> >> Region-dependent interpretation of units is IMHO a quite bad idea. >> >> 2015-04-09 5:41 GMT, Bryce Nesbitt <[email protected]>: >> >>> How it's entered into the database, and how it's displayed, are two >>> separate things. Humans are messy. Unless the API starts validating >>> entries, entries will vary in format, even if we officially say that "46 >>> C" >>> is the official format. But software can parse and normalize numbers. >>> >>> That said: temperature=___ is a problematic tag regardless of the >>> formatting of the data. >>> >>> >> > > _______________________________________________ > Tagging mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/tagging >
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