Optimal survey map projection system

Details Optimal survey map projection system Optimal survey map projection system

1997-02-28

2000-07-18

Louis-Jacques, Jacques H.

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

701213, 34235712, 34235701, G06C 778, G01C 2100

Patent

active

06092022&

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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