Tag: TrafficMining

SRTM Plugin for OpenStreetMap

One of the features of our TrafficMining Project at the LMU was to use additional attributes in routing queries. Standart routing queries usually just use time and distance for calculating the fastest/shortest routes. In order to have an additional attribute we decided to use evelation data as this might be an issue if you also want to take fuel cost into account or if you’re planning a bike tour (instead of crossing a hill, you might want to consider a longer tour that avoids crossing the hill).

The problem just was that data nodes from OpenStreetMap are defined mostly by id, latitude and longitude, which is totally enough for painting 2D maps and standard routing queries. As the elevation is not added to OpenStreetMap data directly (and it is also not intended to be added to the OSM data base), a component was needed that parses both Nasa SRTM data as well as OSM data files in order to combine the data.

In the first version, we parsed the SRTM data directly and addied it to the nodes of the OSM-Graph directly. During one refactoring, we decided to integtrate Osmosis into the project in order to be able to read PBF files (another OpenStreetMap file format). During this integration we decided to separate the SRTM parsing into a separate module so that other people can make use of it as well. The plugin was open sourced some time ago at google code as the “osmosis-srtm-plugin” under an LGPL licence.

Relevant Links:

TrafficMining Project goes open source

Quite some time ago I wrote about a little demo that was published at SIGMOD 2010 and SSTD 2011 (see post1 and post2).

The TrafficMining project could be described shortly as:

An academic framework for routing algorithms based on OpenStreetMapdata. Actually this framework is not intended to replace current routing applications but to provide an easy to use GUI for testing and developing new routing algorithms on real OpenStreetMap data.

Well, what makes this worth a post is the fact that we finally switched development over to GoogleCode with a discussion group at Google Groups.
GoogleCode has the major advantage of a Mercurial repository, an issue tracker, easy code reviews and an miproved possibility to contribute code. If you just want to follow the development, just join the google group or keep a bookmark to the project’s update feed.

By the way: the PAROS and MARiO downloads can be found there in the downloads section.

MARiO: Multi Attribute Routing in Open Street Map

Yeah, I got a new Publication accepted at Symposium on Spatial and Temporal Databases (SSTD) 2011 that is dealing with OpenStreetMap Data (using the JXMapKit and JXMapViewer).

MARiO: Multi Attribute Routing in Open Street Map

Franz Graf, Hans-Peter Kriegel, Matthias Schubert, Matthias Renz

Published at Symposium on Spatial and Temporal Databases (SSTD) 2011
Conference Date: August 24th – 26th, 2011
Conference Location: Minneapolis, MN, USA.

Abstract:

In recent years, the Open Street Map (OSM) project collected a large repository of spatial network data containing a rich variety of information about traffic lights, road types, points of interest etc.. Formally, this network can be described as a multi-attribute graph, i.e. a graph considering multiple attributes when describing the traversal of an edge. In this demo, we present our framework for Multi Attribute Routing in Open Street Map (MARiO). MARiO includes methods for preprocessing OSM data by deriving attribute information and integrating additional data from external sources. There are several routing algorithms already available and additional methods can be easily added by using a plugin mechanism. Since routing in a multi-attribute environment often results in large sets of potentially interesting routes, our graphical fronted allows various views to interactively explore query results.

Documents:

Bibtex

@INPROCEEDINGS{GraKriRenSch11,
  AUTHOR      = {F. Graf and H.-P. Kriegel and M. Renz and M. Schubert},
  TITLE       = {{MARiO}: Multi Attribute Routing in Open Street Map},
  BOOKTITLE   = {Proceedings of the 12th International Symposium on Spatial and Temporal Databases (SSTD), Minneapolis, MN, USA},
  YEAR        = {2011}
}

PAROS download!

Das Ziel war nobel: Code aufräumen, schöner machen, refactoren und dokumentieren und dann online stellen.

Die Realität war derart, dass es leider wichtigeres zu tun gibt. Daher stelle ich das PAROS-Projekt, das dieses Jahr auf der SIGMOD war so online wie es ist: lauffähig, und vom Softwareengineeringaspekt ziemlich hässlich. Aber vielleicht kann ja jemand etwas damit anfangen – zumindest die kleinen hacks um größere Graphen auch annehmbar schnell zeichnen zu können.

Ausserdem ist es ein schönes Beispiel, wie man JXMapKit und OpenStreetMap (OSM) zu Forschungszwecken im Bereich Datamining, GIS (GeoInformationssysteme) und auch SpatialIndexing  verwenden kann. Auf der Konferenz kannten viele OSM nämlich erstaunlicherweise gar nicht, obwohl sie auf dem Bereich tätig waren.

Und zur nächsten Version muss ich nochmal nachsehen, ob es nach den Google Maps Terms of Services  immernoch verboten ist, Maps in Nicht-Browser-Anwendungen zu integrieren. Wäre natürlich auch sehr nett, oder weiß jemand Bescheid? (Update Jan. 2011: das ist nicht mehr verboten!)

Relevante Links: