Tech Report HCIL-99-31

Fredrikson, A., North, C., Plaisant, C., Shneiderman, B. (December 1999)
Temporal, Geographical and Categorical Aggregations Viewed through Coordinated Displays: A Case Study with Highway Incident Data
Proceedings of the Workshop on New Paradigms in Information Visualization and Manipulation, Kansas City, Missouri, November 6, 1999 (in conjunction with ACM CIKM'99), ACM New York, 26-34. [Published Version]
HCIL-99-31

Information visualization displays can hold a limited number of data points, typically a few thousand, before they get crowded. One way to solve this problem with larger data sets is to create aggregates. Aggregations were used together with the Snap-Together Visualization system to coordinate the visual displays of aggregates and their content. If two displays each hold one thousand items then rapid access and visibility can be maintained for a million points. This paper presents examples based on a database of highway incident data.