On Fri, Aug 7, 2009 at 3:12 PM, John Smith<delta_foxt...@yahoo.com> wrote: > maxspeed:school_zone=hh:mm-hh:mm[,hh:mm-hh:mm];speed > This explains what the restriction is, school zone, the times it is in effect > and the reduced speed all in one line.
That is much better than the current proposal IMHO, good job. Just to demonstrate, the example in that format is: maxspeed:school_zone=08:30-09:30,14:30-15:30;40 > school zones are a corner case and I don't think you should try to shoe horn > them into a general time restriction since they don't operate during school > holidays. Yeah I know what you mean. The options are either 1) have two kinds of restrictions (time and school_zone) or 2) extend the time syntax to include "school_day" as well as the usual "day" identifiers (Mo, Tu, We, etc.). You are suggesting that the first is better, which is subjective. By the way, the outcome of this discussion could well be applicable to http://wiki.openstreetmap.org/wiki/Proposed_features/Extended_conditions_for_access_tags i.e., what we have so far for school_zone could be generalised to: <X>:<K> = <L>;<V>, where X = the standard tag (maxspeed, or access, or bicycle, etc.) K = the kind of limits of applicability L = the limits of applicability (in an appropriate format according to K) V = the value of the limit (e.g. yes/no, speed in kmph, etc.) So you would have, for the examples at http://wiki.openstreetmap.org/wiki/Proposed_features/Extended_conditions_for_access_tags maxspeed = 100 maxspeed:school_zone = 08:30-09:30,14:30-15:30;40 maxspeed:vehicle = hgv;60 maxspeed:weather = wet;80 bicycle:time = 10:00-18:00;no access:weight = >5.5;destination maxspeed:vehicle = hgv;120 maxspeed:vehicle:time = hgv;Sa,Su;80 In the last example, the format is extended to: <X>:<K1>:<K2> = <L1>;<L2>;<V> which seems fine. But there is an obvious problem: you may want two values for the same key, e.g. maxspeed:weather = wet;80 and maxspeed:weather = snow;30 I'm guessing this is not OK? Actually......... won't this often be a problem if you insist on not putting values in the key? How would you say maxspeed is 40 between 7am-9am, 60 between 4pm-7pm, and 80 otherwise? _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
