Modalflow: Cross-Origin Flow Data Visualization for Urban Mobility
Open Access
- 15 November 2020
- journal article
- research article
- Published by MDPI AG in Algorithms
- Vol. 13 (11), 298
- https://doi.org/10.3390/a13110298
Abstract
Pervasive data have become a key source of information for mobility and transportation analyses. However, as a secondary source, it has a different methodological origin than travel survey data, usually relying on unsupervised algorithms, and so it requires to be assessed as a dataset. This assessment is challenging, because, in general, there is not a benchmark dataset or a ground truth scenario available, as travel surveys only represent a partial view of the phenomenon and suffer from their own biases. For this critical task, which involves urban planners and data scientists, we study the design space of the visualization of cross-origin, multivariate flow datasets. For this purpose, we introduce the Modalflow system, which incorporates and adapts different visualization techniques in a notebook-like setting, presenting novel visual encodings and interactions for flows with modal partition into scatterplots, flow maps, origin-destination matrices, and ternary plots. Using this system, we extract general insights on visual analysis of pervasive and survey data for urban mobility and assess a mobile phone network dataset for one metropolitan area.Keywords
This publication has 39 references indexed in Scilit:
- A Survey of Traffic Data VisualizationIEEE Transactions on Intelligent Transportation Systems, 2015
- Origin–destination trips by purpose and time of day inferred from mobile phone dataTransportation Research Part C: Emerging Technologies, 2015
- Origin-Destination Flow Data Smoothing and MappingIEEE Transactions on Visualization and Computer Graphics, 2014
- Quantifying travel behavior for infectious disease research: a comparison of data from surveys and mobile phonesScientific Reports, 2014
- Mapping Large Spatial Flow Data with Hierarchical ClusteringTransactions in GIS, 2014
- Quantifying Key Errors in Household Travel SurveysTransportation Research Record: Journal of the Transportation Research Board, 2013
- Graph Bundling by Kernel Density EstimationComputer Graphics Forum, 2012
- In-Depth Comparison of Global Positioning System and Diary RecordsTransportation Research Record: Journal of the Transportation Research Board, 2011
- Visualisation of Origins, Destinations and Flows with OD MapsThe Cartographic Journal, 2010
- Feminist Visualization: Re-envisioning GIS as a Method in Feminist Geographic ResearchAnnals of the American Association of Geographers, 2002