Hi,
I would like to amend the Ferry routes in NSW, particularly in and around Sydney using a different approach. At the moment the Ferry routes are mapped with a *single way approach,* by tagging a single way drawn along the whole route (i.e. Circular Quay to Manly). The only benefit for the single line approach, that I can see, is that it is simple and represents well on the map tiles. The problem with this approach is that it does not allow ways to share different routes and or variants. That’s where my particular problem lies. When I try to generate route paths from GTFS Sydney Ferries and private ferries (TfNSW) using the OSM Ferry route paths as the routing network, a lot of errors occur. Many variants/trips in the GTFS dataset, which are based on recent timetable information from Sydney Ferries and other private operators, have no routing options. This is because of the single way approach between wharves. For example, F4 Watsons Bay – Pyrmont via Rose Bay and Circular Quay: To go from Rose Bay to Circular Quay the routing takes you around the harbour (Taronga Zoo, Milsons Point, Balmain and Darling H) before getting to CQ Wharf 5. Instead, there should be a direct route displayed between Rose Bay and Circular Quay Another example is that one ferry service might use wharf 5 at Circular Quay, but 20% of the trips/variants might use wharf 4. Those 20% of trips/variants will not route to and from the correct wharf using the single way approach. To be able to use the OSM Ferry route network for routing using GTFS files from TfNSW, I want to map based on the *relation approach*. Just like other transport modes are being mapped in OSM (i.e. bus routes). This would mean that more than one ferry route could share some ways, enabling users to extract OSM ferry routes to use for routing. I would like to get thoughts from OSM users on this approach before I start mapping in such way. Regards, Maradona11
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