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Merging a Gravimetric Model of the Geoid with GPS/Levelling data : an Example in Belgium

  • H. Duquenne
  • M. Everaerts
  • P. Lambot
Part of the International Association of Geodesy Symposia book series (IAG SYMPOSIA, volume 129)

Abstract

A new model of the gravimetric quasi-geoid covering Belgium was computed in 2003. In order to adapt it to the needs of levelling by GPS, it was necessary to fit it to a set of levelled GPS points embodying the Belgian geodetic and levelling reference systems. A dense network was available, allowing significant methodological and statistical studies on how to model differences between the gravimetric geoid and the levelled GPS points. A method using kriging with the outlier detection in GPS-levelling data was applied. Several models of trend and covariance functions were tested. A reference surface dedicated to levelling by GPS in Belgium is presented, the accuracy of which is about 2–2.5 cm.

Keywords

Geoid levelling by GPS kriging Belgium 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2005

Authors and Affiliations

  • H. Duquenne
    • 1
  • M. Everaerts
    • 2
  • P. Lambot
    • 3
  1. 1.Laboratoire de Recherche en GéodésieIGN/ENSGMarne-la-ValléeFrance
  2. 2.Royal Observatory of BelgiumBrusselsBelgium
  3. 3.National Geographic InstituteBrusselsBelgium

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