I can think of quite a few border roads that will need signposts before that happens.
Phil -- Sent from my Nokia N9 On 25/09/2012 1:38 SomeoneElse wrote: Peter Miller wrote: > > Correct. I did however use alternative maxspeed:type at times which > also appears in the DB and which I feel is better than source:maxspeed > which to my mind should be used for 'source:maxspeed=survey' or > 'source:maxspeed=local authority spreadsheet-Dec12' or similar. > However... lets leave that discussion to another day but either way > not information has been lost by my edits and the data has been made > more consistent. > The problem with e.g. "source:maxspeed = uk:nsl_single" is exactly as you describe it - it doesn't actually describe the source of the maxspeed, merely its type. For example, in this case: http://www.openstreetmap.org/browse/way/135256609/history "source:maxspeed = sign at E" would be correct, rather than as currently tagged. If I want to add that bit of information, I now can't. In terms of UK maxspeed tagging, according to taginfo there are around 10k UK "source:maxspeed=UK:nsl_single" or similar values, and around 5k instances of "maxspeed:type" - both relatively large numbers. The largest number of "source:maxspeed" is still "sign". Presumably the argument for tagging "maxspeed=60mph" where it's actually signed as "national" is that it's too hard for routers to figure out whether something's a single or dual carriageway? I'm not sure why we have to depart from the "on-the-ground" rule in this case - if it's not obvious that something's a dual carriageway surely that's a tag that should be added, not some curious code value stored against a tag (source:maxspeed) that's usually used for something else entirely? With that in mind, I don't personally see a problem with "national" - After all, there are certainly plenty of other speed limits that aren't a nice number - UK motorways with active traffic management, French motorways when it's raining, and (according to the wiki) German iving streets. The other issue, of course, is how long "UK:nsl_single" (or GB:nsl_single, which is also used) will continue to be meaningful; it wouldn't surprise me to see different "national" single carriageway limits in Scotland or Wales within 3-5 years. Cheers, Andy _______________________________________________ Talk-GB mailing list [email protected] http://www.openstreetmap.org/browse/way/135256609/history
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