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Pixel wise pie charts: placement of data points visualizing spatial value distributions


Janetzko, Halldór; Stein, Manuel (2018). Pixel wise pie charts: placement of data points visualizing spatial value distributions. In: EuroVis 2018 | 20th EG/VGTC Conference on Visualization, Brno (Czech Republic), 4 June 2018 - 8 June 2018.

Abstract

Handling overplotted points in spatial pixel-based visualizations is usually done either by aggregation or sampling. The third rather unusual alternative is replacing data items untangling overplotted regions. Depending on the placement algorithm visual artifacts will be created based on an optimization between overplotting, display usage, and conservation. In this paper, we exploit the replacement and create pixel-based pie-charts reflecting the numerical distribution of spatially referenced data points. With this novel approach, we bridge the gap between the overview and detail phase in Shneiderman's Information Seeking mantra. Our presented algorithm is informally evaluated with a biological case study on baboon movement.

Abstract

Handling overplotted points in spatial pixel-based visualizations is usually done either by aggregation or sampling. The third rather unusual alternative is replacing data items untangling overplotted regions. Depending on the placement algorithm visual artifacts will be created based on an optimization between overplotting, display usage, and conservation. In this paper, we exploit the replacement and create pixel-based pie-charts reflecting the numerical distribution of spatially referenced data points. With this novel approach, we bridge the gap between the overview and detail phase in Shneiderman's Information Seeking mantra. Our presented algorithm is informally evaluated with a biological case study on baboon movement.

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Additional indexing

Item Type:Conference or Workshop Item (Paper), refereed, original work
Communities & Collections:07 Faculty of Science > Institute of Geography
Dewey Decimal Classification:910 Geography & travel
Language:English
Event End Date:8 June 2018
Deposited On:11 Jan 2019 11:13
Last Modified:11 Jan 2019 11:54
Publisher:Eurographics Association
ISBN:978-3-03868-060-4
Additional Information:EuroVis 2018 - Short Papers
OA Status:Green
Publisher DOI:https://doi.org/10.2312/eurovisshort.20181086

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