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Kingston University

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DEMView: 3-D Visualization of DEM Error

Mon, 20 Sep 2010

M.B. Gousie and M.J. Smith Proceedings of Spatial Accuracy Assessment in Natural Resources and Environmental Sciences, Leicester
It is well known that a digital elevation model (DEM) may contain systematic or other errors. In many 3-D visualization systems, problems in the data may be highlighted, but it is often difficult for the viewer to discern the exact nature of the problem. We present DEMView, a viewing and error assessment system specifically for use with DEMs. The system displays a DEM in 3-D with the usual translation, rotation, and zooming tools. However, the system incorporates a suite of visual (qualitative) and statistical (quantitative) assessment tools that help a researcher determine and analyze errors and uncertainty in a given DEM. A case study shows the efficacy of the system.

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