City Metric city metric: L 1 metric and transportation network shortest path: walk L 1 metric quickest path? walk walk city metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
City Metric city metric: L 1 metric and transportation network Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
City Metric city metric: L 1 metric and transportation network Def.: transportation network graph G = ( V C , E C ) planar, straight-line embedding only horizontal and vertical edges Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
City Metric city metric: L 1 metric and transportation network G Def.: transportation network graph G = ( V C , E C ) planar, straight-line embedding only horizontal and vertical edges Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
City Metric city metric: L 1 metric and transportation network G Def.: transportation network graph G = ( V C , E C ) planar, straight-line embedding only horizontal and vertical edges speed off the network: 1 speed on the network: v > 1 Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
City Metric city metric: L 1 metric and transportation network G Def.: transportation network graph G = ( V C , E C ) planar, straight-line embedding only horizontal and vertical edges speed off the network: 1 speed on the network: v > 1 Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
City Metric city metric: L 1 metric and transportation network G Def.: transportation network graph G = ( V C , E C ) planar, straight-line embedding only horizontal and vertical edges speed off the network: 1 speed on the network: v > 1 c := | V C | Complexity of G : O ( c ) Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
City Metric city metric: L 1 metric and transportation network G q Def.: transportation network graph G = ( V C , E C ) planar, straight-line embedding only horizontal and vertical edges speed off the network: 1 speed on the network: v > 1 c := | V C | p Complexity of G : O ( c ) distance between two points? Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
City Metric city metric: L 1 metric and transportation network G q Def.: transportation network graph G = ( V C , E C ) planar, straight-line embedding only horizontal and vertical edges L 1 speed off the network: 1 speed on the network: v > 1 c := | V C | p Complexity of G : O ( c ) distance between two points? Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
City Metric city metric: L 1 metric and transportation network G q Def.: transportation network graph G = ( V C , E C ) planar, straight-line embedding only horizontal and vertical edges L 1 speed off the network: 1 speed on the network: v > 1 c := | V C | p Complexity of G : O ( c ) distance between two points? Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
City Metric city metric: L 1 metric and transportation network G q Def.: transportation network graph G = ( V C , E C ) planar, straight-line embedding only horizontal and vertical edges L 1 speed off the network: 1 speed on the network: v > 1 c := | V C | p Complexity of G : O ( c ) distance between two points? d C ( p, q ) quickest path Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Higher Order City Voronoi Diagrams Q: Higher Order Voronoi Diagrams? Q: City Voronoi Diagrams? Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Our Contribution Euclidean-Metric City-Metric Structural Complexity Structural Complexity Θ( n + c ) first-order first-order Θ( n ) k th -order k th -order Θ( k ( n − k )) O ( k ( n − k ) + kc ) Ω( n + kc ) farthest-site Θ( n ) Θ( nc ) farthest-site [Bae et al., 2012] Time Complexity Time Complexity O (( n + c ) log n ) first-order O ( n log n ) first-order O ( k 2 ( n + c ) log( n + c )) O ( k 2 n log n ) k th -order k th -order O ( nc log n log 2 ( n + c )) farthest-site O ( n log n ) farthest-site [Bae et al., 2012] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Our Contribution Euclidean-Metric City-Metric Structural Complexity Structural Complexity Θ( n + c ) first-order first-order Θ( n ) k th -order k th -order Θ( k ( n − k )) O ( k ( n − k ) + kc ) Ω( n + kc ) farthest-site Θ( n ) Θ( nc ) farthest-site [Bae et al., 2012] Time Complexity Time Complexity O (( n + c ) log n ) first-order O ( n log n ) first-order O ( k 2 ( n + c ) log( n + c )) O ( k 2 n log n ) k th -order k th -order O ( nc log n log 2 ( n + c )) farthest-site O ( n log n ) farthest-site [Bae et al., 2012] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – Euclidean Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – Euclidean Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – Euclidean Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – Euclidean Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – Euclidean Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – Euclidean Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – L 1 Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – L 1 Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – L 1 Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – L 1 Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – L 1 Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – L 1 Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – L 1 Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – L 1 Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric O ( c ) activation points [Aichholzer et al., 2004] Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric arrow Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric arrow Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric arrow r q q ′ p activation point Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric arrow r q q ′ p activation point Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric arrow r q q ′ p Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric arrow r q q ′ p Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric arrow r q q ′ p Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric arrow r q q ′ p Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric arrow r q q ′ p Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
Wavefront Propagation – City Metric arrow r q q ′ p Institute of Theoretical Informatics Andreas Gemsa , D.T. Lee, Chih-Hung Liu, Dorothea Wagner – Higher Order City Voronoi Diagrams. Prof. Dr. Dorothea Wagner
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