On Thu, Jun 17, 2010 at 6:00 AM, Richard Mann <richard.mann.westoxf...@googlemail.com> wrote: > Nathan - there's some form of setting in your email account that means > that every time you reply to a thread we see a new thread starting > (dropping the Re: prefix, maybe?). This makes it very hard to follow > the thread, as the emails get out of order.
That's because I had it set to not receive emails from the list, as I don't want to read most of the threads. I've temporarily changed this. > > On the specific example, in the UK these would be tertiarys: an > ordinary street that serves a "through" or within-city distribution > function. They'd have to be pretty dominated by the traffic > (effectively part of a gyratory) before they got tagged as > primary_link I think of a tertiary highway as a collector or distributor, used in the initial or final portion of the trip to get to or from the higher classifications. These, on the other hand, are short connecting links that could be anywhere in a trip; for instance, here US 30 eastbound follows a portion of Woodlynne Avenue between the normal-looking ramp and White Horse Pike: http://maps.cloudmade.com/?lat=39.91878&lng=-75.088924&zoom=17&directions=39.92145421035915,-75.0871217250824,39.918343875726904,-75.0898790359497,39.91567776216949,-75.08675694465637&travel=car&styleId=1&opened_tab=1 Here's an example in London, where traffic eastbound on the A406 can't turn right directly onto the A598, and so has to use the one-lane one-way Charter Way as a connecting link. We have Charter Way tagged as primary despite not carrying its own A number: http://www.openstreetmap.org/?lat=51.59072&lon=-0.2&zoom=17&layers=B000FTF Are you saying you'd tag Charter Way as tertiary? The US term for this configuration, by the way, is "jughandle", and they're most common in New Jersey: http://en.wikipedia.org/wiki/Jughandle. Most of the time they look like normal ramps, but in many cases existing streets are utilized. > > On the general question of links, I think the wiki may be wrong, in > that the link between a primary and a trunk should probably be a > primary_link, not a trunk_link. This is most likely to avoid the > situation where you get an ugly join between ways. > > However, there doesn't appear to be consensus even among mainstream UK > renderers (OS and A-Z are different), so I have limited hopes on > arriving at a universal consensus. I've adopted the OS convention > (everything to the lower level) locally, because it renders better. I > think I'll start a survey of what different map brands do on the wiki > page. > > {Before you all shout, a link between a motorway and a trunk should be > a motorway_link; that's a special case for motorways, because > motorways are roads with special laws} I actually agree to some extent here - a simple link bypassing an intersection should get the lower classification, but in a more complicated junction the links should get the higher one (just like at a motorway junction). _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
