Hello Kevin and everyone! This is great.
Kevin, I actually would like to help, whereever I can, mapping the entrances and/or connecting these entrances to the street network. What can I do to help? On Sun, May 31, 2015 at 11:13 AM, Kevin Farrugia <kevinfarru...@gmail.com> wrote: > Hey George, > > I'll work towards improving the way the connections are, but because of > the large size of the network, the fact that it's invisible in imagery & > GPS is useless, and I can only remember so much, it might take some time to > make it perfect. It's a bit of a wild west of connections down there and > there can be many connections to the surface contained within one city > block (8+ in some cases) with a mix of stairs, escalators, and elevators > with varying levels of access based around the time of day. > > 1. Entrances are only mapped sometimes. Currently on OSM it seems that the > underground PATH connects directly with the above ground network rather > than having an elevator or stairway between the level change. In the > latest updates I've made I've added in escalators, elevators, and stairs > and connected them to the PATH (level=-1) or the ground level network with > an entrance node included on its intersection with the building. One thing > I've also noticed is that the PATH footways are marked using layer=-1, not > level=-1 - I don't know if this makes a difference to OSRM. > > 2. I've been linking the entrances with indoor footways that connect to > the PATH via elevators and escalators/stairs and then linking the other > side of the entrance node to the sidewalks or roads so that it should be > able to route between the two networks. > > If you have any suggestions or comments please tell us. > > Thanks for the heads up, > Kevin (Kevo) > > > -Kevin Farrugia > kevinfarru...@gmail.com > > On Thu, May 28, 2015 at 4:08 PM, George Silva <georger.si...@gmail.com> > wrote: > >> Hello Everyone! Good afternoon! >> >> I'm working on a project that uses OpenStreetMap to do some routing. I'm >> using the OSRM router as a service. >> >> We identified a problem with the routing, and the problem does not lie in >> the router itself. Some routes we try to execute in our software, go >> underground, into the PATH tunnels. When I try to route between two points >> inside the PATH, all goes well and the router does it's job just fine. >> >> When I'm above ground and try a route that goes underground a few things >> can happen: >> >> 1. OSRM gives me the car route and then traces a direct line to the point; >> 2. OSRM routes using the PATH; >> >> The second only happens when the PATH is connected to the street graph. >> >> So, we will be applying a two step routing, to the entrances of the PATH, >> and from there, to the underground locations, when necessary. When it's >> above ground > above ground, we'll just use a simple routing scheme. >> >> My questions are: >> >> 1. How are the entrances mapped? Is there any specific tag on OSM that >> marks them as entrances or that the level is changing (from 0 to -1, for >> example)? >> >> 2. All of these entrances should be connected to the main graph, >> otherwise they are unreachable from a street or a sidewalk. How can those >> be mapped? >> >> I'm sorry about the lengthy email, but I want to contribute and I do not >> want to step on any toes. >> >> Thanks >> >> -- >> George R. C. Silva >> Sigma Geosistemas LTDA >> ---------------------------- >> http://www.sigmageosistemas.com.br/ >> >> _______________________________________________ >> Talk-ca mailing list >> Talk-ca@openstreetmap.org >> https://lists.openstreetmap.org/listinfo/talk-ca >> >> > -- George R. C. Silva Sigma Geosistemas LTDA ---------------------------- http://www.sigmageosistemas.com.br/
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