Re: [OSM-talk] access=destination valid only in one direction
On Fri, Jul 10, 2009 at 5:03 PM, Tobias Knerro...@tobias-knerr.de wrote: Stanislav Brabec wrote: Is there a way how to map a street with access=destination valid just only for one direction? In the reverse direction it is a standard drive through street. Using my proposal http://wiki.openstreetmap.org/wiki/Proposed_features/Extended_conditions_for_access_tags it would be access[forward] = destination (or access:forward = destination, depending on what syntax people like better) Of course that's way direction dependent. and it does not work NOW. Once it MAY be accepted in this OR a modified form (sometime in the future), then used in a significant number of places (much, much later), then the first programs may get a feature-request to implement support for it (where the normal access=destinationis already a bit tricky and not all programs have internal datastructures that allow such a construct at all) and quite a while later some developer may find the time to actually implement and test it. Then people will start filing bugs as it does not work perfectly the first time and later these bugs may be fixed. THEN it will be supported in SOME programs while others will still ignore it completely. Whereas drawing 2 ways works now. These 2 ways may even share exactly the same nodes and if they share the same nodes even turning around at any of these nodes will work. Marcus ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] access=destination valid only in one direction
Am 11.07.2009 08:23, Marcus Wolschon: On Fri, Jul 10, 2009 at 5:03 PM, Tobias Knerro...@tobias-knerr.de wrote: Stanislav Brabec wrote: Is there a way how to map a street with access=destination valid just only for one direction? In the reverse direction it is a standard drive through street. Using my proposal http://wiki.openstreetmap.org/wiki/Proposed_features/Extended_conditions_for_access_tags it would be access[forward] = destination (or access:forward = destination, depending on what syntax people like better) Of course that's way direction dependent. and it does not work NOW. Once it MAY be accepted in this OR a modified form (sometime in the future), then used in a significant number of places (much, much later), then the first programs may get a feature-request to implement support for it (where the normal access=destinationis already a bit tricky and not all programs have internal datastructures that allow such a construct at all) and quite a while later some developer may find the time to actually implement and test it. Then people will start filing bugs as it does not work perfectly the first time and later these bugs may be fixed. THEN it will be supported in SOME programs while others will still ignore it completely. Whereas drawing 2 ways works now. These 2 ways may even share exactly the same nodes and if they share the same nodes even turning around at any of these nodes will work. I think forcing *everything* to be backward compatible does hinder evolution sometimes. You could also start tagging access:forward and eventually routers *have to* support it because it's used in such big numbers. And, besides, drawing two ways simply does not reflect reality on the ground and as such is a wrong information that cannot be healed later on. It's easier for a router-preprocessor to turn access:forward into two ways internally. Claudius ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] access=destination valid only in one direction
On Sat, Jul 11, 2009 at 8:23 AM, Marcus Wolschonmar...@wolschon.biz wrote: Whereas drawing 2 ways works now. These 2 ways may even share exactly the same nodes and if they share the same nodes even turning around at any of these nodes will work. Marcus This is not tagging for the renderer but drawing for the routing applications. It's not better. Pieren ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
[OSM-talk] access=destination valid only in one direction
Hallo. Is there a way how to map a street with access=destination valid just only for one direction? In the reverse direction it is a standard drive through street. http://www.openstreetmap.org/browse/way/30764132 -- Stanislav Brabec http://www.penguin.cz/~utx ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] access=destination valid only in one direction
2009/7/10 Stanislav Brabec u...@penguin.cz: Hallo. Is there a way how to map a street with access=destination valid just only for one direction? In the reverse direction it is a standard drive through street. http://www.openstreetmap.org/browse/way/30764132 The standard way to do this is with a second parallel way tagged accordingly, Like a dual carriageway. Peter. ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] access=destination valid only in one direction
Peter Childs wrote: 2009/7/10 Stanislav Brabec u...@penguin.cz: Hallo. Is there a way how to map a street with access=destination valid just only for one direction? In the reverse direction it is a standard drive through street. http://www.openstreetmap.org/browse/way/30764132 The standard way to do this is with a second parallel way tagged accordingly, Like a dual carriageway. That's also an ugly way to do it, as it's skewing reality quite a bit. Better is to use some syntax like: access:forward=destination or access:backward=destination depending on the way direction. And to add support for that in programs as well of course :-) Ben ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] access=destination valid only in one direction
On Friday, 10 July 2009 15:03:32 +0100, Peter Childs pchi...@bcs.org writes: 2009/7/10 Stanislav Brabec u...@penguin.cz: Hallo. Is there a way how to map a street with access=destination valid just only for one direction? In the reverse direction it is a standard drive through street. http://www.openstreetmap.org/browse/way/30764132 The standard way to do this is with a second parallel way tagged accordingly, Like a dual carriageway. ... only if it is a dual carriageway! If it is a single carriageway without physical divider etc., only _one_ way is mapped. In this case I tag a direction depending attribute with an additional :forward resp. :backward in the key: key:forward=... key:backward=... For example, a way with maxspeed=100 and maxspeed:forward=70 is a street with a speed limit of 100 km/h in one, and 70 km/h in the other direction. Forward and backward is given in the direction the way is drawn, and these tag additions are reversed by newer version of JOSM, if the way is reversed. Best wishes, -bernd ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] access=destination valid only in one direction
On Fri, Jul 10, 2009 at 4:03 PM, Peter Childspchi...@bcs.org wrote: The standard way to do this is with a second parallel way tagged accordingly, Like a dual carriageway. Peter. Is it really the standard way to draw a dual carriageway just to fix access restrictions ? My guess it's not. Pieren ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] access=destination valid only in one direction
Peter Childs wrote: 2009/7/10 Stanislav Brabec u...@penguin.cz: Is there a way how to map a street with access=destination valid just only for one direction? In the reverse direction it is a standard drive through street. The standard way to do this is with a second parallel way tagged accordingly, Like a dual carriageway. It seems to be sub-optimal for a narrow street with a single driving lane and parking zone. It would look wider than the crossing 4-lane motorway street. -- Stanislav Brabec http://www.penguin.cz/~utx ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
Re: [OSM-talk] access=destination valid only in one direction
Stanislav Brabec wrote: Is there a way how to map a street with access=destination valid just only for one direction? In the reverse direction it is a standard drive through street. Using my proposal http://wiki.openstreetmap.org/wiki/Proposed_features/Extended_conditions_for_access_tags it would be access[forward] = destination (or access:forward = destination, depending on what syntax people like better) Of course that's way direction dependent. Tobias Knerr ___ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
