Did you has a look to openstreetmap? cheers
-- Giovanni -- On Tue, 2010-08-03 at 17:07 -0700, berryman wrote: > Hello, > > I am hope to use GIS for a traffic analysis program that I am involved with. > After having looked at a couple weeks worth of GIS resources, I still feel > like I haven't found what I'm looking for and it's time to get some human > input. > > The main source of my frustration is that all of the standard data formats > seem to be too general for my purpose. Common formats provide the ability > to encode points, lines, polylines, and polygons (where the locations are > unitless). But I need the ability to encode the geographic location (e.g. > lat/long, NAD83) of high-level constructs. For instance, I'm not just > interested in the location of streets, I'm interested in the location of > each lane. I also need to know how street topology and traffic direction so > that I can make path planning determinations. Finally, it would even be > ideal if I could encode the location of traffic signals, stop signs, > bus-only lanes, etc. > > I know that these types of encoding must exist somewhere , because my Garmin > GPS understands the rules of the streets and can anticipate things coming > up. For instance, it might tell me "stay in the right lane." Are there > standard data formats for encoding this information? Or is the ability to > encode this a non-public extension of some more generic standard? If so, > then how do I go about extending some other standard for my application? > > Thanks all! _______________________________________________ Discuss mailing list Discuss@lists.osgeo.org http://lists.osgeo.org/mailman/listinfo/discuss
