This post is slightly spooky as only the other day I told Ed and Marc at
opencage to reclaim the box, I can't be bothered anymore. It's been dormant for
12 months.
The bus stuff works certainly as poc. Getting hold of all the UK buses was
beyond me, but Ireland and Holland have accessible saturation coverage of
everything that moves. The process I developed handles both those countries on
modest hardware within a day, RoI about 3 hours flat I think. I didn't pay the
bill at digital ocean and they zapped my database despite the good money I
paid.for backups. I was working at a planetary level if you like, I was piling
on humongous amounts of data and repairing bottle necks. I had everything but
North America, a substantial chunk but a lot less than half of the whole lot,
and I'd already done the GTFS of countless other civilizations and bonkers
datasets. Just from a fun point of view, New York is a scared place if you are
building this. I was leaving her till last.
I looked at this subject very deeply for several years and produced a
substantial architecture to handle not just national level , but the entire
planetary infrastructure. To cope with that you are obviously going to need an
incremental architecture, the data set is moving so rapidly you'd never get it
printed. So I concocted an hierarchical incremental reductive tile rendering
architecture I call Archimedes. So we not only print just what we need to but
we can actually update the higher and global tiles in almost real time.Even
places like Paris become a serious mouthful. We are trying to mechanically tag
essentially our own way grouping with all the relevant services. The data is
presented in an often super stupendously redundant manner I extensively stress
tested this architecture. I was about to go coast to coast and hoover up all
those Canoga Park metros in the US but I couldn't find the Greyhound stuff and
hence not a national picture. It was intended as my gift to you, I do this for
free. If the UK is so incompetent it can't even collect the GTFS that must
necessarily exist for it to be on Google, Greyhound buses and Indian railways,
consider the critical details of their national level public service to be not
public domain information, and with nobody in here paying any commercial
attention to me, I packed in. There are some potentially intractable issues
with line/network reduction, I drifted off into trying to render a road map
that would show me say Kazakhstan or Brazil at full view, but still handle
Dortmund, Shanghai and the Eastern seaboard. I believe that is doable, and just
the transport infrastructure is complex enough so needs btonbe addressed. .
Just painting a substantial city in one view needs reduction and I wanted to
build an interrogative map where you can pan out and discover stuff. We don't
have much in the way of ferry data on GTFS but on examination of them on the
map I decided they were quite reliable enough to be considered real. The boat
network on the Irrawaddy delta is stupendous FYI.You can get away with
scrawling the timetable on the map for ferries, it's perhaps a valid counter
example as they are almost entirely mapped on a per service basis. The Baltic
routes are too dense but almost everywhere else it's basically a service
announcement. I guess that's accepted practice and I think it works. Doing it
for bus and rail is futile and will result in worthless archeological data.
The only way this can be done is essentially getting the route planner to draw
routes from GTFS. If you think that's not ultimately commercially feasible, at
least not on a grand scale, we are just going to have to endure a world of bits
and pieces where you have to in effect know where you are going beforehand,
then in the final analysis I have to concede defeat. If on the other hand you'd
like to have a go at an interactive bus map, and with a wee bit of cooperation
from the route finding people also the trains, of the entire global published
GTFS dataset, it is most certainly doable.
Sent from Yahoo Mail on Android
On Tue, 1 Jun 2021 at 4:58, Philip Barnes wrote: On
Mon, 2021-05-31 at 22:18 +0100, Michael Tsang wrote:
> On Monday, 31 May 2021 16:14:47 BST Roger Slevin wrote:
> > and one in which I agree with Tony, Mark and Peter in saying that
> > public
> > transport services and timetables don’t appear to me to have a
> > valid place
> > in OSM
>
> We have already mapped the complete bus networks in certain cities.
> In OSM
> terms, a public transport route is defined as "the order where the
> service
> stops to carry passengers, and the path where it transverse on". It
> does not
> include the timetable data.
>
> I have also mapped a lot of bus and train routes in different cities
> as well,
> and it is very useful for OSM to have bus and train routes. When I
> travel to a
> new city I use OsmAnd a lot to find which bus I need to take to go to
> a certain
>
