If it's 42 f, you'd go into hypothermia almost instantly. =} Assuming c unless explicit should be enough for mapping.
Javbw > On Apr 12, 2015, at 8:23 AM, Warin <[email protected]> wrote: > >> On 10/04/2015 4:50 AM, Andy Mabbett wrote: >>> On 9 April 2015 at 01:52, Warin <[email protected]> wrote: >>> >>> Say a mapper tags >>> >>> temperature=42 >> Under what circumstances would such a tag be used. How would we know >> that the actual temperature is not 41 or 43? > > You want more detail? > > Say a mapper tags > amenity=swimingpool > temperature=42 > > ---------------- Is that enough detail? > > The question is > is the 42 taken as degrees Celsius or rejected as an error???? > > Presently 'degrees Celsius' is a little ahead of ' rejection' . > > ======================================== > Accuracy? really? in OSM? No dimension entry into OSM includes any statement > of accuracy ... > If you want a full statement of 'accuracy' it would have to be a statement of > uncertainty with level of confidence and coverage factor. > > No .. you don't want to go there!!!!!! > No measurement is 'error free'. They all have some uncertainty .. > Reference http://kcdb.bipm.org/appendixC/search.asp?service=All > For example NIST claim, in thermometry, for a liquid in glass thermometer at > 'normal' temperatures their best uncertainty is 0.02 K (neglecting any > contribution by the thermometer being calibrated). > > Note : BIPM uncertainties are adjusted for 95% level of confidence and > approximately a coverage factor of 2. > > No .. you don't want to go to statements of errors and accuracy .. > > Instead .. what would a 'reasonable person' expect for such a statement of > 'the temperature is 42 °C'? Most would readily accept ±1°C given the > resolution of the statement. They may even accept ±2°C .. but not ±10°C. > > What would be acceptable for a statement of 'width is 1 metre' given in OSM > on a path? Why am I wasting time on such a question? Because Andy asked. > Suggest you do some research on it Andy. > > > > > > > > _______________________________________________ > Tagging mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/tagging _______________________________________________ Tagging mailing list [email protected] https://lists.openstreetmap.org/listinfo/tagging
