Verity Visualization: Visual Mappings

Abstract:

Visualized data often has dubious origins. One way to define data lineage is by describing the uncertainty. In addition, different forms of uncertainty and errors are also introduced as the data is derived, transformed, interpolated, and finally rendered. In the absence of integrated presentation of data and its associated uncertainty, the analysis of the visualization is incomplete at best and often leads to inaccurate or incorrect conclusions. This paper presents several techniques of presenting data together with uncertainty. The idea behind these techniques can be applied to both spatial (e.g. surface) and temporal (i.e. animation) domains. We describe these techniques of representing the truths about the data as verity visualization. The same techniques can also be used to make the users aware of the data quality or to emphasize and draw their attention to the uncertainty.

Keywords:

data quality, uncertainty glyphs, fat surfaces, perturbations, oscillations.

Paper:

A postscript version of this technical report can be obtained by clicking here . It is also available via anonymous ftp to ftp.cse.ucsc.edu then get /pub/tr/ucsc-crl-95-48.ps.Z.

Images:

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Last modified Friday, 02-Feb-1996 16:21:34 PST.