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H. Wu, K. Maruyama, T. Kawagoe, K. Misue, M. Arikawa, S. Takahashi:
"Aspect-Ratio-Preserved Labeling on Metro Maps";
Poster: 2nd Schematic Mapping Workshop, TU Wien, Vienna; 11.04.2019 - 12.04.2019.

For better readability, metro lines are often aligned along the octilinear directions. Predefined layouts, however, limit the feasibility of placing station name labels. In this paper, we present a novel approach to automating the placement of station names around a schematic network while maximally respecting its original layout as the mental map. The idea behind the proposed approach is to progressively annotate stations from congested central downtown areas to sparse rural areas by intro- ducing the sum of geodesic distances over the network to identify the proper order of stations to be annotated. Our approach elongates line segments of the network without changing their directions to spare labeling space around the station. Additional constraints are introduced to restrict the aspect ratios of the region confined by the metro network for better preservation of the mental map in the original schematic layout.

Progressive Annotation, Geodesic Distances, Schematic Layout, Mental Maps, Mixed-Integer Programming

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