> There is likely to be a considerable difference between the average speed > and the maximum speed, particularly along streets that are badly congested > at different times of day. The average speed is useful for routing > decisions, > but should be tagged separately from the maximum speed.
Even average speed for routing purposes would be difficult to determine. How would you differentiate between car, motorcycle, bicycle, unicycle, horse or shank's pony*? David * Apologies: just remembered the international audience: this is an idiom meaning walking. -------Original Email------- Subject :Re: [OSM-talk] A GPS Trace Visualizer >From :mailto:deltafoxtrot...@gmail.com Date :Wed Aug 18 07:57:17 America/Chicago 2010 On 18 August 2010 22:51, andrzej zaborowski <balr...@gmail.com> wrote: > For some time I have been thinking about making a tileserver / WMS > with a visualisation of OSM GPS traces, but one where you can see how > many traces overlap at a given point (so some kind of heat map thing). > This would be used for tracing in JOSM instead of displaying all the > traces in the same colour. This would really let you estimate where > the centreline of a road / lane is and would let you really take > advantage of having 1000s of traces for the same street (like in big > cities with many mappers). The centre line is obvious, but there is a number of other things you could do as well, like indicating average/mean speed to help with maxspeed=* tagging and also where traffic lights exist. _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk -- John F. Eldredge -- j...@jfeldredge.com "Reserve your right to think, for even to think wrongly is better than not to think at all." -- Hypatia of Alexandria _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk -- View this message in context: http://gis.638310.n2.nabble.com/A-GPS-Trace-Visualizer-tp5435033p5436728.html Sent from the General Discussion mailing list archive at Nabble.com. _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk