Le 28/06/2010 14:14, Tiziano D'Angelo a écrit :
Hello everybody!
In the past months, as you probably read here, I mapped almost
entirely the bus network of Padova, Italy.
Bello lavoro ! Nice work !
Could you fill the wiki page. Some relations seem not present so it is
difficult to find the model you took.
I presented my work at OSMit 2010 including a review of the different
tools available with their pro and cons (slideshow available in
Italian here:
https://docs.google.com/present/edit?id=0AX90JH2rM34XZGR6cGJoczlfODU3anM2emgzcA&hl=it
<https://docs.google.com/present/edit?id=0AX90JH2rM34XZGR6cGJoczlfODU3anM2emgzcA&hl=it>).
Interresting. Could also be linked on the wiki page.
Imagine to:
* view a map of the entire network of a specific area (OPNVKarte,
OSMTransport, LatLon)
* specify the desired level of detail showing one, two...all
routes (OSMTransport) and possibility of showing different
renderings
* click over a line on the map/select the line from a list and see
the sketch of that line with all the stops and with the desired
level of details as correspondences, P+R, train stations, etc...
(Roland Olbricht Sketch Generator)
with links on correspondences.
* provide local transport authorities tools to render timetables,
sketch of routes, proximity maps of each stop for internal use
or for users at each stop
provide transport files such as
http://code.google.com/intl/fr/transit/spec/transit_feed_specification.html
Allready we can build some of those files (stops.txt, routes.txt,
trips.txt, shapes.txt) from OSM data.
The excercie of creating such files will strenghten the model.
In these months I aquired expertise in this field and have found
interesting contacts with possible partners in this project, so I
would be delighted to give my best to make this project possible. A
test city could be Padova, whose local transport authority doesn't
have such a tool and which has a complete mapping of stops.
I have writen a little program in python that analyse a GPX to find
stops and times. But I can make it run only on my computer.
It could be a tool to help gathering data.
The code is available on demand.
Le 28/06/2010 17:37, Micha? Borsuk a écrit :
* no approved standard. Should the stops be within the line as a
point, or as their physical location shows?
If I have well understood the question, I think that a bus stop must be
mapped where it is physicaly, and not on the line. So at a bus stop you
usualy have two nodes one on left, one on right.
Should we map a separate relation just for the branch of the line from
the split, or for the entire line?
For the entire line. It is easy to make a copy of a relation in JOSM, a
to fulfill it.
What is the point of having two relations for two directions in
Europe? IMHO Oxomoa seems way too difficult for beginners, and it's
overblown. The overhead needed to maintain the standard is WAY too
big. I have calculated that sticking to the standard would cost me 25
to 50% more time, with just marginally better results. The time to
understand the standard is also not to be ignored. A new standard,
better suited but compatible with what has been done is needed.
I feel also that the Oxoma schema is sometimes too eavy.
But for maintenance two relations, one in each way, is easyer to
maintain for me.
Because the road taken in the two ways are very often different.
Having ordered members in the relation is an easy way to find a mistake
in JOSM.
With two stops (one on each side of the road) it is easier to fill the
right relation with the right stop.
The schema could seem too difficult for a beginner but:
The beginners don't start mapping with a transport network.
The tools are more and more handful. The reality is complex.
It is longer to build but easier to maintain.
I'm sure that the Google specifications are usually enough. How can we
map them ?
* Nevertheless, I am having trouble maintaining the collection, and
there is no queue of editors waiting to help.
The problem of maintaining elements of relations in Potlatch (and
keeping them ordered) have been talked with the authors.
To sum it all up, at present I decided to put the lines on the map
just so that openbusmap.org <http://openbusmap.org> (ÖPNVkarte) can
show them, but details must wait. I suggest that you just remember
what you want to introduce, and I suggest that presently we work on
slimming the oxomoa suggestion to make them scale better, that is to
make them accessible to beginners, as well as usable for pros. In my
opinion OSM is no Wikipedia, where one can just click Edit and produce
sensible results. We need to step out to prospective editors, make the
experience less of a hell for beginners.
With a good documentation, maybe the beginners would understand the
schema. But you are right, the Oxoma page is not synthetic !
--
FrViPofm
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