[OSM-talk] Using destination_sign relations for complex exit ramps?

2010-04-22 Thread Phil! Gold
I've been trying to figure out how to tag some moderately complex exit ramp systems when a single motorway_junction doesn't seem adequate. An email to the newbies list led to an IRC discussion that led to a solution that I like, so I wanted to present it here to see what other people think and pos

Re: [OSM-talk] Using destination_sign relations for complex exit ramps?

2010-04-23 Thread Roy Wallace
> I want to be able to > capture all of that information in OpenStreetMap so that a theoretical > routing agent can say, e.g., "Take exit 91 to the right, then take exit > 91A to the left." > >  [0]: I-70 westbound exit 91 http://osm.org/go/ZZd8vPYT > > The IRC discussion pointed out that this fall

Re: [OSM-talk] Using destination_sign relations for complex exit ramps?

2010-04-23 Thread Konrad Skeri
As the original proposer of the destination_sign I think this is a great example when the relation is useful. I assume there is some roadsign before exit 91 that announces the upcoming exit. The destination= of the relation would be what it says on the sign, which could be a place or a road number.

Re: [OSM-talk] Using destination_sign relations for complex exit ramps?

2010-04-23 Thread Roy Wallace
On Fri, Apr 23, 2010 at 11:08 PM, Konrad Skeri wrote: > > In your case you would get 3 relations. I-70 to exit 91 (with > destination= according to the sign at I-70), exit 91 to exit 91A, and > exit 91 to exit 91B (with destination= accoring to the sign(s) at exit > 91 before the 91A/B fork). It

Re: [OSM-talk] Using destination_sign relations for complex exit ramps?

2010-04-27 Thread Phil! Gold
* Roy Wallace [2010-04-24 10:55 +1000]: > It may be just me, but using type=destination_sign + ref=91 seems to > imply that "91" is a property of the sign. That's a good point. Perhaps it would make more sense to have an exit_ref tag (and document it on the wiki?). > Doesn't an "exit" exist ind

Re: [OSM-talk] Using destination_sign relations for complex exit ramps?

2010-04-28 Thread Roy Wallace
On Tue, Apr 27, 2010 at 11:58 PM, Phil! Gold wrote: > >> Doesn't an "exit" exist independently of the sign? If so, is there a >> way to map it independently of a destination_sign? > > It does, but I don't see any better relation for it What about similar to a turn_restriction relation? I.e. with

Re: [OSM-talk] Using destination_sign relations for complex exit ramps?

2010-04-29 Thread Phil! Gold
* Roy Wallace [2010-04-28 17:52 +1000]: > On Tue, Apr 27, 2010 at 11:58 PM, Phil! Gold wrote: > >> Doesn't an "exit" exist independently of the sign? If so, is there a > >> way to map it independently of a destination_sign? > > > > It does, but I don't see any better relation for it > > What abo