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Article

Empirical Insights from a Study on Outlier Preserving Value Generalization in Animated Choropleth Maps

1
Interfaculty Department of Geoinformatics-ZGIS, University of Salzburg, 5020 Salzburg, Austria
2
AMAG Austria Metall AG, 5282 Ranshofen, Austria
*
Author to whom correspondence should be addressed.
Academic Editors: Beata Medynska-Gulij and Wolfgang Kainz
ISPRS Int. J. Geo-Inf. 2021, 10(4), 208; https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi10040208
Received: 11 February 2021 / Revised: 15 March 2021 / Accepted: 16 March 2021 / Published: 1 April 2021
(This article belongs to the Special Issue Multimedia Cartography)
Time series animation of choropleth maps easily exceeds our perceptual limits. In this empirical research, we investigate the effect of local outlier preserving value generalization of animated choropleth maps on the ability to detect general trends and local deviations thereof. Comparing generalization in space, in time, and in a combination of both dimensions, value smoothing based on a first order spatial neighborhood facilitated the detection of local outliers best, followed by the spatiotemporal and temporal generalization variants. We did not find any evidence that value generalization helps in detecting global trends. View Full-Text
Keywords: choropleth map animation; local outliers; generalization choropleth map animation; local outliers; generalization
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MDPI and ACS Style

Traun, C.; Schreyer, M.L.; Wallentin, G. Empirical Insights from a Study on Outlier Preserving Value Generalization in Animated Choropleth Maps. ISPRS Int. J. Geo-Inf. 2021, 10, 208. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi10040208

AMA Style

Traun C, Schreyer ML, Wallentin G. Empirical Insights from a Study on Outlier Preserving Value Generalization in Animated Choropleth Maps. ISPRS International Journal of Geo-Information. 2021; 10(4):208. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi10040208

Chicago/Turabian Style

Traun, Christoph, Manuela L. Schreyer, and Gudrun Wallentin. 2021. "Empirical Insights from a Study on Outlier Preserving Value Generalization in Animated Choropleth Maps" ISPRS International Journal of Geo-Information 10, no. 4: 208. https://0-doi-org.brum.beds.ac.uk/10.3390/ijgi10040208

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