Abstract
This paper reviews more than 10 recent doctoral theses and master’s theses accomplished at the Chair of Cartography, Technical University of Munich (TUM). These research works address two persistent challenges involved in the digital mapmaking process: understanding complex input data and improving cartographic design to keep up with the changing roles and increasing demands of users on immediately usable maps. At first, a dedicated computational approach based on Conditional Random Fields (CRF) for data enhancement of Volunteered Geographic Information (VGI) is introduced and demonstrated with test data from trajectories of floating taxis and OpenStreetMap (OSM). It is followed by a summarized overview of visual analytical approaches for event and behaviour discovery and their implementations on various VGI data sources including trajectories of floating taxis, twitter messages and trajectories of football matches. Finally, a concept of image map with a multilayered visual hierarchy is proposed and demonstrated with a set of attention-guided design strategies.
Zusammenfassung
Der vorliegende Beitrag gibt einen Überblick über die Forschungsinhalte van mehr als 10 aktuellen Dissertationen und Masterarbeiten, die am Lehrstuhl für Kartographie der Technischen Universität München durchgeführt wurden. Diese Arbeiten befassen sich mit zwei dauerhaften Herausforderungen in der digitalen Kartographie: Verstehen van komplexen Eingabedaten und Verbesserung der Gestaltungsverfahren, um mit den sich veriindernden Roi/en und den stetig wachsenden Anforderungen der Kartennutzer mitzuhalten. Zunächst wird ein auf Probabilistischen Graphischen Modellen (PGM) basierter Ansatz zur Datenanreicherung der VGI vorgestellt und anhand van Taxifahrtrouten und Straßennetz van OpenStreetMap (DSM) demonstriert. Es folgt eine Darstellung van visuellen analytischen Ansätzen sowie deren Umsetzung zur Entdeckung des Events und des Verhaltens van Personen in verschiedenen VGJ-Datenquellen wie z. 8. Trajektorien der Floating Taxis, Twitternachrichten und Trajektorien des Fußballspiels. Schließlich wird dos Konzept der Bildkarte, die in der Regel aus Kartensymbolen im Vordergrund und einem Rasterbild im Hintergrund besteht, infrage gestellt. Eine Reihe van aufmerksamkeitsgetriebenen Gestaltungsstrategien zeigen, wie sich Bildkarten mit mehreren visuellen Ebenen generieren /assen.
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Meng, L., Murphy, C.E., Ding, L. et al. A review of research works on VGI understanding and image map design. j. Cartogr. Geogr. inf. 67, 17–22 (2017). https://doi.org/10.1007/BF03544577
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DOI: https://doi.org/10.1007/BF03544577