Nikhil Kalghatgi

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A digital lens is a user interface mechanism that is a potential solution to information mangement problems. We investigated the use of digital lensing applied to imagery analysis. Participants completed three different types of tasks (locate, follow, and compare) using a magnification lens with three different degrees of offset (aligned, adjacent, and(More)
Geospatial displays typically contain many data layers ranging in type and level of detail that often result in dense, occluded, and cluttered map displays. We investigated a localized, "detail on-demand" filtering strategy called semantic lensing that in certain situations provides a more efficient and desirable approach than global filtering for(More)
Emergency situations often play out over extended geographic regions and can present response personnel with numerous types of data at various level of detail. Such data may be displayed in mapping software tools that organize the data into layers. Sufficiently complex scenarios can result in dense, occluded, and cluttered map displays. We investigated a(More)
It is important for analysts to realize the connection between two distant nodes in a graph, which is not readily supported by existing space-filling techniques. We developed an experimental prototype, FocusTree, which displays graphs in two view modes: fisheye or tree. In fisheye view, selected nodes and the nodes connecting them remained full-sized while(More)
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