I agree with François and Marc. Le ven. 27 juil. 2018 à 13:28, Warin <61sundow...@gmail.com> a écrit :
> Unfortunately not everyone uses the same units... heights are in meters, > feet .. depending on where you come from or what activity you follow. > You're right, but as OSM is an international database, standardizing data (meaning units too) is a must. Just like phone numbers where although local residents usually don't use ITU prefixes (+XX), phones numbers should be entered with those prefixes to ensure valid usage for consumers. Le ven. 27 juil. 2018 à 21:21, Paul Allen <pla16...@gmail.com> a écrit : > If you're navigating somewhere unfamiliar to you and GPS isn't giving you > an > accurate signal, what you're interested in is what signs actually *say.* > Because > when you're in confusing territory a speed sign, or a bridge clearance, or > whatever > may be a significant clue. Knowing that the speed limit is 40.2336 km/h > doesn't tell > you to look for a sign saying 25 mph. > Most GPS/routing applications (including OSMAnd, Google maps) already convert maxspeeds to user's prefered unit. I do not remember ever seeing a fractional legal speed, so by rounding the value you can obtain the sign value with good confidence. Another thought : Even if maxspeed=* on highway=* could be in kph, traffic_signs could still be mapped with local, explicit or implicit units. That would solve both problem. Le ven. 27 juil. 2018 à 22:22, Tobias Knerr <o...@tobias-knerr.de> a écrit : > I currently prefer explicit units in the database because they document > the mapper's intent and avoid ambiguity. > > Defaults aren't always obvious. For example, people mapping pipelines > have documented millimetres as the default for diameter=*, but it seems > tree mappers haven't gotten the memo and (reasonably) assume it's > defaulting to metres like height=*, width=* or circumference=*. > An unit selector can be implemented in editors quite easily. StreetComplete already does work with different units for example.
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