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Undulation can be used to determine the best fitting ellipsoid
and new geodetic datum. It is also important for promotion
the precision of the national control points. There are
many methods for densifying undulations. In this study,
Bilinear Method, Multiquartic Method, and Translation of GPS
Adjustment Network are used. From the results, a
comparsion between real surveying and methods of
densification is executed. In addition, the advantages
and drawbacks of the densifying methods are discussed.
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