As a physicist I don't like any value without units. The degree symbol is not needed, but C would be great: 21 C, 70 F.
On Sun, Apr 12, 2015 at 6:43 AM John Willis <jo...@mac.com> wrote: > 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 <61sundow...@gmail.com> wrote: > > > >> On 10/04/2015 4:50 AM, Andy Mabbett wrote: > >>> On 9 April 2015 at 01:52, Warin <61sundow...@gmail.com> 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 > > Tagging@openstreetmap.org > > https://lists.openstreetmap.org/listinfo/tagging > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging >
_______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
