Method and system for generating detail-in-context lens presentations for elevation data
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United States of America Patent
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Feb 6, 2007
Grant Date -
Sep 22, 2005
app pub date -
Mar 18, 2005
filing date -
Mar 18, 2004
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for generating a presentation of a region-of-interest in an elevation data representation for display on a display screen, comprising: calculating a displacement height for at least one point in the representation falling within a lens by inversely scaling a vertical height of the point from a viewpoint for the presentation by a magnification for the lens; if the point is within a shoulder region of the lens, scaling the displacement height by a value of the shoulder function evaluated at a value given by a distance between a projection point in the basal plane and a closest point on a perimeter of a focal region as projected onto the basal plane, the distance being scaled by a distance between the closest point and an intersection point on a perimeter of the shoulder region; and, displacing the point by the displacement height to generate the presentation.
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