If the community is capable of agreeing on one worldwide list of defaults, then yes. I suggest our defaults be constructed so that we need to retag a minimum of roads, e.g. by looking at TIGER classifications. Mappers will learn this short list and will be able to map parts of foreign countries.
But I think they won't, in which case we need to tag everything explicitly. Tagging things explicitly is how you create high quality databases. "(a) if for some reason the traffic rules change so that the sign marking that kind of road allows pedestrians, we don't have to edit all trunks in a country, and" Changing traffic rules is extremely expensive for governments, so they do it very rarely. It is far more common for newbies to misclassify a road and then we at least still have correct tags. An example so fresh that mapnik still renders the mistake : http://www.openstreetmap.org/?lat=-25.751366&lon=28.198875&zoom=18&layers=B00FTF "(b) it fixes the problem where someone might not be familiar enough with the traffic rules so he doesn't know for example that pedestrians aren't allowed and doesn't add that access tag" Mappers will still be allowed to omit tags. I wouldn't be able to distinguish between and A road and a B road in the U.K. and that's what highway=road is for. But I if I see a road with cyclists on it, I'll know to tag it with bicycle=yes. -- There's application for maxspeed in gosmore beyond routing. WinCE users want to see that tag while they are driving. But I'm not going to make any promises. On Mon, Sep 8, 2008 at 5:01 PM, Lambertus <[EMAIL PROTECTED]> wrote: > So you suggest the community negotiates one list with defaults for each > type of road that applies worldwide? Mappers have to apply appropriate tags > on roads (countries) that don't fit this default? > > That does not solve the problem where mappers visit a foreign country. They > still need to do a lookup to see which tags should be applied. It only makes > it easier for end users (e.g. route planners). > > PS. Does this mean that Gosmore will soon obey to maxspeed tags? ;-) > > > Nic Roets wrote: > >> On Mon, Sep 8, 2008 at 3:23 PM, Lars Aronsson <[EMAIL PROTECTED] <mailto: >> [EMAIL PROTECTED]>> wrote: >> >> Here you assume that "trunk" is a well defined concept. But it >> isn't. >> >> Spot on. >> >> And defining things per country leads to all sorts of problem. For example >> mappers applying domestic rules when visiting foreign countries. Confusion >> when debugging routing software. Next mappers will omit units of measurement >> because they feel it it's implied for their country. >> >> The solution is for editors to create defaults for these disputed access >> restriction tags and allow users to change them before committing them to >> the database. >> >> >> ------------------------------------------------------------------------ >> >> _______________________________________________ >> talk mailing list >> talk@openstreetmap.org >> http://lists.openstreetmap.org/listinfo/talk >> > >
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