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Abstract
When Ellipsoidal Heights will do the Job why look Elsewhere?
Dr. Muneendra Kumar
Consultant
munismk@yahoo.com
Abstract
In Today’s world, with GPS, we can survey ellipsoidal heights (h) directly with 5-10 cm accuracy for geodetic control points and differential heights (Dh) between well defined topographic features with relative accuracy of 1: 1Million or better. This type of height information enables us to contour real Earth topography on “no-projection” maps and charts drawn on ellipsoidal surface. Instead of using Mean Sea Level or geoid as zero reference surface, the ellipsoid depths or heights referenced to time-invariant ellipsoid as reference will ensure safe marine and air navigation worldwide.
This paper explains and provides important details how these height “h” and/or “Dh” will work in different applications. It also includes simple algorithm(s) or procedural steps to get the best results.
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