We just had an interesting discussion about ferry routing here at Telenav. In our testing we see that we sometimes fail to route folks over car ferries, even if that would be the preferred route and alternatives would be much, much longer.
It turns out that this happens because some of the access roads to these ferries are tagged as highway=service, sometimes service=driveway. For various reasons we don't want to route folks through service roads, so this poses a challenge. Here's an example: http://www.openstreetmap.org/#map=19/48.42169/-123.37231 As a lightweight solution, we came up with this idea: why don't we tag service roads that lead to and from a ferry as access=ferry. The access= qualifier is already common on service roads, because of the nature of highway=service as a road that generally provides access to some particular destination. This is not going to be affecting a huge number of ways - there are only around 500 or so ways tagged with route=ferry, of those, only a minority are car ferries, and of those, only a small amount would have only service roads connected to them. I can figure out how many exactly if you're interested. I am curious to hear your thoughts. -- Martijn van Exel OSM data specialist Telenav http://www.osm.org/user/mvexel http://wiki.openstreetmap.org/wiki/User:Mvexel http://hdyc.neis-one.org/?mvexel _______________________________________________ Talk-us mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-us
