lets see the c0d3! On Sat, May 22, 2010 at 1:15 AM, Daniel Lissner <dliss...@gmail.com> wrote:
> Hello OSM developers, > I am a computer scientist researcher at the University of Memphis > Computer Science Dept. In a recent project, we needed a representation > of the road network which would provide us with information about > connectivity and distance between sections of road. We found that the > OSM data provided a suitable platform to build such a graph-like > structure. > I have written a java program to process the XML format OSM data and > achieve this. Currently, each sequential pair of nodes referenced in > the WAY elements of roads are considered as a section of road. their > lat/long coords are passed to a method to calculate their distance via > law of spherical cosines and haversine formula. After every Way in the > dataset is processed, another method populates adjacency and incidence > information. Each "road section" (essentially a graph edge) knows > which road sections it is adjacent to, the two node points that make > its end points, its distance, it's heading (in respect to North) and > its street name. Thus far we are not very concerned with other > metadata but it's certainly feasible n possible to include. Further, > each node (essentially a graph vertex) knows its reference number, its > lat/lng coords, and all of the road sections which are incident to it. > The purpose of this structure for us was to serve as a state model for > simulations for our research work. While I'm not at liberty to share > all of our research purposes at this time, I am however able to share > the code I wrote which processes the osm data and creates a graph > structure of the road network. > The first version simply instantiates and populates several java > objects, which we tried to design and code as clean and efficiently as > possible. We are now migrating the processor to instead store the data > in a MySQL database. > So, I am writing the mailing list to ask if the osm developer > community would find any use for this little utility which creates a > connected graph structure of Ways, either as a straightforward set of > java objects or as a MySQL database. OSM has benefited our research > and I would certainly like to give back. > > Thanks, > Daniel > > _______________________________________________ > dev mailing list > dev@openstreetmap.org > http://lists.openstreetmap.org/listinfo/dev >
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