Contraction hierarchies

Contraction hierarchies

In applied mathematics, the method of contraction hierarchies is a technique to simplify shortest-path routing by first creating precomputed "contracted" versions of the connection graph. It can be regarded as a special case of highway-node routing.[1]

Contraction hierarchies can be used to generate shortest-path routes much more efficiently than Dijkstra's algorithm or previous highway-node routing approaches,[citation needed] and are used in the OpenTripPlanner software.[2]

References

  1. ^ Robert Geisberger (1 July 2008). "Contraction Hierarchies: Faster and Simpler Hierarchical Routing in Road Networks". Institut für Theoretische Informatik Universität Karlsruhe. http://algo2.iti.kit.edu/documents/routeplanning/geisberger_dipl.pdf. Retrieved 2010-12-27. 
  2. ^ "Learn - OpenTripPlanner". http://opentripplanner.com/learn. Retrieved 2010-12-27. 

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