normalization into SI is the sort of thing that engineers and scientists go for, and speaking as a (computer) scientist it has some appeal.
but practically it's probably not a good idea in mapping, where i think we should be using local units in an unambiguous manner. if i see maxspeed=40 on a road in the US w/o units, i have no idea what i'm looking at, it could be 40mph or it could be 25mph. the mapper who entered the data knew what s/he was looking at but i sure don't. richard On 7/27/18 11:20 AM, marc marc wrote: > I agree maybe with the exeption of case like maxspeed > > François voltage is a good usecase to open an issue to the whised app. > > Le 27. 07. 18 à 14:19, Andrew Hain a écrit : >> My own preference is to have no (zero) units in the database, decimals >> where wanted (maxwidth=2.2) and unit management support in editors. >> >> -- >> Andrew >> ------------------------------------------------------------------------ >> *From:* Warin <61sundow...@gmail.com> >> *Sent:* 27 July 2018 12:27:04 >> *To:* tagging@openstreetmap.org >> *Subject:* Re: [Tagging] Let's get (quite) rid of units and their >> multiples in OSM values >> On 27/07/18 21:11, Martin Koppenhoefer wrote: >>> sent from a phone >>> >>>> On 26. Jul 2018, at 21:26, François Lacombe <fl.infosrese...@gmail.com> >>>> wrote: >>>> >>>> I don't want to break things but only improve them, all the best >>> one issue with using only one unit for a tag is that they can’t always be >>> transformed without rounding. E.g. maxspeed=55mph cannot be converted to >>> kph without losing information >>> >>> Also, shorter notations are better readable, hence reduce the likeliness of >>> errors not noted. >>> >>> On the other hand, I agree in the example of voltage it would make it >>> easier for queries to use the same unit. (you still can make queries, but >>> they are more complicated if you have to take units into account) >>> >>> >> Unfortunately not everyone uses the same units... heights are in meters, >> feet .. depending on where you come from or what activity you follow. >> >> Voltages are in volts so the same units... but multiplies are common for >> high voltages .. no one uses 33000 volts .. they all use 33 kv. >> If you stipulate that all voltages have to be in kv then 115 v becomes >> 0.115 kv, 240 v becomes 0.24 kv and 415 v becomes 0.415 kv .. >> that is not how people talk about these things. >> >> >> >> _______________________________________________ >> 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 -- rwe...@averillpark.net Averill Park Networking - GIS & IT Consulting OpenStreetMap - PostgreSQL - Linux Java - Web Applications - Search _______________________________________________ Tagging mailing list Tagging@openstreetmap.org https://lists.openstreetmap.org/listinfo/tagging
