2010•Hydrographic Surveying and ChartingRequires access

Determination of Islets' Elevation in the Coast Control Survey

Gao Jun

Abstract

Through comparing the results of quasi-geoid heights derived from these geo-potential models EGM96,WDM94 and GFZ are selected.By using the adaptable geo-potential and taking advantages of remove-restore technique,the geoid heights of every control site and point of certainty is calculated the corrections to points of certainty are fransfered which is calculated by GPS/leveling points' height anomaly dates via the approach of distance weighted average.Owing to geodetic heights and model geoid heights of points of certainty are known,the elevations are easily determined.

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Key concepts: Geoid, Geodesy, Undulation of the geoid, Geodetic datum, Elevation (ballistics), Global Positioning System, Anomaly (physics), Dynamic height