title: KelpFusion: a hybrid set visualization technique.
abstract: We present KelpFusion: a method for depicting set membership of items on a map or other visualization using continuous boundaries. KelpFusion is a hybrid representation that bridges hull techniques such as Bubble Sets and Euler diagrams and line- and graph-based techniques such as LineSets and Kelp Diagrams. We describe an algorithm based on shortest-path graphs to compute KelpFusion visualizations. Based on a single parameter, the shortest-path graph varies from the minimal spanning tree to the convex hull of a point set. Shortest-path graphs aim to capture the shape of a point set and smoothly adapt to sets of varying densities. KelpFusion fills enclosed faces based on a set of simple legibility rules. We present the results of a controlled experiment comparing KelpFusion to Bubble Sets and LineSets. We conclude that KelpFusion outperforms Bubble Sets both in accuracy and completion time and outperforms LineSets in completion time.
authors.affiliation: TU Eindhoven.
authors.forename: Wouter
authors.initials: W
authors.lastname: Meulemans
authors.forename: Nathalie Henry
authors.initials: NH
authors.lastname: Riche
authors.forename: Bettina
authors.initials: B
authors.lastname: Speckmann
authors.forename: Basak
authors.initials: B
authors.lastname: Alper
authors.forename: Tim
authors.initials: T
authors.lastname: Dwyer