[talk-au] Ferry Routes mapping in NSW

[Andrew Harvey]

I think so long as there's an active ferry route running between two
terminals then it should have a route=ferry[1] connecting them, roughly
following the actual geometry the route normally takes. Where you have a
ferry route that sometimes has a few variants, eg. sometimes skips a
terminal, or sometimes goes to a different wharf, then that can be
accounted for using the ferry route relation.

As the wiki points out[1], this could be a simple way, or a route
relation[2]

[1] https://wiki.openstreetmap.org/wiki/Tag:route%3Dferry
[2] https://wiki.openstreetmap.org/wiki/Relation:route

On 6 August 2018 at 23:20, Sigurjón Gísli Rúnarsson <sjonni11 at gmail.com>
wrote:

> 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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