Drawing metro maps using bézier curves

Authors:
Martin Fink;Herman Haverkort;Martin Nöllenburg;Maxwell Roberts;Julian Schuhmann;Alexander Wolff
Affiliations:
Lehrstuhl für Informatik I, Universität Würzburg, Germany;Faculteit Wiskunde en Informatica, TU Eindhoven, The Netherlands;Institut für Theoretische Informatik, KIT, Germany;Department of Psychology, University of Essex, Colchester, U.K.;Lehrstuhl für Informatik I, Universität Würzburg, Germany;Lehrstuhl für Informatik I, Universität Würzburg, Germany
Venue:
GD'12 Proceedings of the 20th international conference on Graph Drawing
Year:
2012

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Abstract

The automatic layout of metro maps has been investigated quite intensely over the last few years. Previous work has focused on the octilinear drawing style where edges are drawn horizontally, vertically, or diagonally at 45°. Inspired by manually created curvy metro maps, we advocate the use of the curvilinear drawing style; we draw edges as Bézier curves. Since we forbid metro lines to bend (even in stations), the user of such a map can trace the metro lines easily. In order to create such drawings, we use the force-directed framework. Our method is the first that directly represents and operates on edges as curves.