Am 18.01.2015 um 07:14 schrieb John F. Eldredge: > You could use a light meter to measure how bright the light is. That > isn't the only factor in the suitability of the lighting, but it is > objective. ... provided that you measure on a dark night without moon and stars, without cars driving on the road and no house next to it enlightened?
Even then: Where do you measure the brightness? directly below the street lamp or in the middle of two subsequent ones? If that's the case, what's "brightness" when you compare different light sources? which light temperature do you use as reference (which wavelengths to measure at?, as the visibility of some colors are quite different when looked at on yellow versus white street lamps (not to mention the more subtile differences within those broad color categories). regards Peter > > -- > John F. Eldredge -- j...@jfeldredge.com > "Darkness cannot drive out darkness; only light can do that. Hate cannot > drive out hate; only love can do that." -- Martin Luther King, Jr. > > On January 16, 2015 11:18:33 AM Volker Schmidt <vosc...@gmail.com> wrote: > >> I would like to enter illumination quality for bicycle infrastructure >> (cycleways) in OSM. >> This is unfortunately a thorny issue, as there is no easy way to >> measure in an objective way the quality of the illumination. >> Has anyone already looked into this? >> I could invent something along the lines of the smoothness tag, which >> in my view faces a similar problem of not being objectively quantifiable. >> I am thinking of something like lit=no|yes|poor|sufficient|good >> >> Obviously, if it were to work for cycle paths it could also be use for >> other highways. >> >> Any suggestions welcome >> >> Volker >> _______________________________________________ >> 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
