Understand the difference between GPS height and height above sea level to avoid errors in your offshore survey work.
This video explains the relationship between ellipsoid height, orthometric height, and geoid height using clear diagrams. You will learn why the geoid model is critical for accurate vertical positioning and how geoidal separation can lead to negative values in specific regions like the Indian Ocean.
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By comparing these vertical datums, you will gain a better grasp of how GNSS data translates to real-world elevation. This breakdown is designed for surveyors and students who need to master the technical nuances of geodetic height systems.
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39 years offshore, 15 years Indian Navy, now with Fugro.
Practical hydrography, GNSS, acoustics & life on survey vessels.
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