Flow map layout via spiral trees

Research output: Contribution to journalArticleAcademicpeer-review

97 Citations (Scopus)
316 Downloads (Pure)

Abstract

Flow maps are thematic maps that visualize the movement of objects, such as people or goods, between geographic regions. One or more sources are connected to several targets by lines whose thickness corresponds to the amount of flow between a source and a target. Good flow maps reduce visual clutter by merging (bundling) lines smoothly and by avoiding self-intersections. Most flow maps are still drawn by hand and only few automated methods exist. Some of the known algorithms do not support edgebundling and those that do, cannot guarantee crossing-free flows. We present a new algorithmic method that uses edge-bundling and computes crossing-free flows of high visual quality. Our method is based on so-called spiral trees, a novel type of Steiner tree which uses logarithmic spirals. Spiral trees naturally induce a clustering on the targets and smoothly bundle lines. Our flows can also avoid obstacles, such as map features, region outlines, or even the targets. We demonstrate our approach with extensive experiments.
Original languageEnglish
Pages (from-to)2536-2544
JournalIEEE Transactions on Visualization and Computer Graphics
Volume17
Issue number12
DOIs
Publication statusPublished - 2011

Fingerprint Dive into the research topics of 'Flow map layout via spiral trees'. Together they form a unique fingerprint.

  • Cite this