On 26 Feb 2009, at 09:24, Frankie Roberto wrote:
Nice find. Digesting now.
One of the problems with the unified stoparea proposal is that it
suggests mapping one way per tram/rail track, which currently looks
a bit of a mess in the default renderers.
Going forward, we'll have to address this somehow. Either we have a
way per track, and leave renderers to somehow figure out how to draw
a single line through the middle, or have a way per track except at
stations, or have a way per track plus a way down the middle for the
'line' (though this'd be a bit confusing when editing).
I do think we need to spend a bit more time bottoming this out at this
stage before coding lots of interchanges. As we are aware the
professional community has also looked at these same issues and we can
learn from them and borrow from them as appropriate.
With railways the decision seems to be to have a way per track and
then use relations to bind these together for some rendering styles.
This same approach can be used for dual carriageways and complex
junctions, even though no one has actually done such a rendering to my
knowledge.
Knowing what I do about train enthusiasts and public transport
enthusiasts I think we are going to end up with every set of tracks
and points in the entire world in OSM! We might start with a single
way through a station and ignore the fact that there are three
platforms and six or more actual sets of tracks, but the coding will
get more and more detailed as more fanatical people get hold of it!
And it will be great if they do. It will follow the pattern of OSM
generally where first people did roads, then major buildings, then
every building and then addresses for buildings and probably are
considering mapping every plant in every garden next!
What we need for transport interchanges is a method to do everything
from the simple overview model where a station is a point feature to
interchanges that are modelled in great detail.
Regards,
Peter
Frankie
On Thu, Feb 26, 2009 at 8:23 AM, Peter Miller <[email protected]
> wrote:
I have been catching up on this great proposal to unify bus/tram/rail
interchange modelling....
http://wiki.openstreetmap.org/wiki/Proposed_features/unified_stoparea
Here is a CEN standards document that has lots of great diagrams of
all sorts of transport interchanges from the very large to very small
from pages 42 to 66 on this document and proposes how they should be
modelled by the professional community in the EU. It is a very new
standard, not yet signed off, that covers everything that NaPTAN does
not cover.
http://www.naptan.org.uk/ifopt/
It is worth looking at for ideas about modelling and for suitable
terminology. The example interchanges would be good resources against
which to test our proposed modelling against before doing loads of
coding of actual places.
Regards,
Peter
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--
Frankie Roberto
Experience Designer, Rattle
0114 2706977
http://www.rattlecentral.com
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