Optimal survey map projection system
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United States of America Patent
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Jul 18, 2000
Grant Date -
N/A
app pub date -
Feb 28, 1997
filing date -
Feb 28, 1997
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Abstract
Methods for providing a representation of location coordinates for a collection of survey points with enhanced accuracy. An obliquely oriented cylindrical surface, rather than a tangent plane, is determined and used as the projection surface at or near a survey base point, with the angular orientation and radius of the cylinder being chosen to optimize the accuracy of the projection. A scale factor that corrects for distances of locations projected onto the cylindrical surface is optionally determined and applied. A three-dimensional transformation of survey location coordinates, optimized to provide a best fit for a selected set of fiducial survey locations, is determined that provides a correspondence between a globally determined height coordinate and a locally determined elevation coordinate.
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