| |  | Fisher, Danyel | Hotmap: Looking at Geographic Attention read moreAbstract: Understanding how people use online maps allows data acquisition teams to concentrate their efforts on the portions of the map that are most seen by users. Online maps represent vast databases, and so it is insufficient to simply look at a list of the most-accessed URLs. Hotmap takes advantage of the design of a mapping systems imagery pyramid to superpose a heatmap of the log files over the original maps. Users behavior within the system can be observed and interpreted. This paper discusses the imagery acquisition task that motivated Hotmap, and presents several examples of information that Hotmap makes visible. we discuss the design choices behind Hotmap, including logarithmic color schemes; low-saturation background images; and tuning images to explore both infrequently-viewed and frequently-viewed spaces. | 2007 |
| | | Congdon, Peter | Mixtures of spatial and unstructured effects for spatially discontinuous health outcomes read moreAbstract: Mixture models are used for spatially adaptive smoothing of health event data (e.g. mortality or illness totals). Such models allow for spatial pooling of strength where appropriate but adopt a mixture strategy that also reflects health risks that are discordant with those of surrounding areas. Mixing is either discrete or based on beta densities. A fully Bayesian estimation and specification strategy is applied with fit based on DIC and BIC criteria. Illustrative applications are to long term illness in 133 London small areas, where event counts are large, and to lip cancer in Scottish counties where the majority of event totals are under 10. | 2007 |
| | | Ball, Robert | Evaluating the Benefits of Tiled Displays for Navigating Maps read moreAbstract: Maps are tools used by almost everyone in society for a va riety of applications. However, when maps are used with computers they are almost always used with small, low pixel count displays, such as desktop monitors. We per formed two experiments involving map usage with various tiled display configurations (one monitor, four monitors, and nine monitors). The first experiment focused on basic map navigation tasks and the second experiment focused on how to maximize the effectiveness of the details-on demand interactive technique with large, high pixel count displays. We conclusively found from the experiments that finding objects and route tracing in maps was performed on average twice as fast on the nine monitors as the one mon itor. We also found that participants on the nine monitor configuration had 70% less mouse clicks, 90% less window management, and a general accuracy and performance im provement over the one monitor. This indicates improved insight for large, high pixel count displays. | 2005 |
| | | Pickle, Linda W. | Effects of the choice of age-adjustment method on maps of death rates read moreAbstract: Sorry no abstract available for this article | 1995 |
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