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—This paper presents two linked empirical studies focused on uncertainty visualization. The experiments are framed from two conceptual perspectives. First, a typology of uncertainty is used to delineate kinds of uncertainty matched with space, time, and attribute components of data. Second, concepts from visual semiotics are applied to characterize the kind(More)
Interactive mapping and spatial analysis tools are under-utilized by health researchers and decision-makers as a result of scarce training materials, few examples demonstrating the successful use of geographic visualization, and poor mechanisms for sharing results generated by geovisualization. Here, we report on the development of the Geovisual(More)
BACKGROUND Kulldorff's spatial scan statistic and its software implementation - SaTScan - are widely used for detecting and evaluating geographic clusters. However, two issues make using the method and interpreting its results non-trivial: (1) the method lacks cartographic support for understanding the clusters in geographic context and (2) results from the(More)
Proposals to establish a 'science of interaction' have been forwarded from Information Visualization and Visual Analytics, as well as Cartography, Geovisualization, and GIScience. This paper reports on two studies to contribute to this call for an interaction science, with the goal of developing a functional taxonomy of interaction primitives for map-based(More)
This paper describes the design and implementation of three web-based geovisualization and geocollaboration applications developed for the domain of public health. Each was implemented using Web 2.0 architecture. First, the Pennsylvania Cancer Atlas is a web-based geovisualization tool for the exploration of county-level cancer incidence rates using(More)
This paper reports on the competitive analysis of water level visualiza-tion tools that support adaptive management in response to global climate change. A competitive analysis study is a theory-based usability engineering method administered to critically compare a suite of related applications according to their relative merits, to the end of revealing(More)
In this paper, we address the topic of user-centered design (UCD) for cartography, GIScience, and visual analytics. Interactive maps are ubiquitous in modern society, yet they often fail to " work " as they could or should. UCD describes the process of ensuring interface success—map-based or otherwise—by gathering input and feedback from target users(More)
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