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- W2109761310 abstract "In a large number of applications, data is collected and referenced by their spatial locations. Visualizing large amounts of spatially referenced data on a limited-size screen display often results in poor visualizations due to the high degree of overplotting of neighboring datapoints. We introduce a new approach to visualizing large amounts of spatially referenced data. The basic idea is to intelligently use the unoccupied pixels of the display instead of overplotting data points. After formally describing the problem, we present two solutions which are based on: placing overlapping data points on the nearest unoccupied pixel; and shifting data points along a screen-filling curve (e.g., Hilbert-curve). We then develop a more sophisticated approach called Gridfit, which is based on a hierarchical partitioning of the data space. We evaluate all three approaches with respect to their efficiency and effectiveness and show the superiority of the Gridfit approach. For measuring the effectiveness, we not only present the resulting visualizations but also introduce mathematical effectiveness criteria measuring properties of the generated visualizations with respect to the original data such as distance- and position-preservation." @default.
- W2109761310 created "2016-06-24" @default.
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- W2109761310 date "1998-10-18" @default.
- W2109761310 modified "2023-09-24" @default.
- W2109761310 title "The Gridfit algorithm: an efficient and effective approach to visualizing large amounts of spatial data" @default.
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- W2109761310 doi "https://doi.org/10.5555/288216.288245" @default.
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