Abstract:
The HRG98a geoid for the entire territory of the Republic of Croatia has
been computed using point gravity data, vertical deflection points, ERS-2 satellite
altimetry data, GPS/Leveling data, digital terrain models as well as the global
geopotential model EGM96. The calculation of geoid undulations is accomplished
by the collocation technique through the remove-restore procedure. The new data
led to a more accurate geoid model for Croatian land and sea territory by
comparison to prior solutions, and to the recent European EGG97 geoid. The geoid
surface obtained should be useful for different purposes, principally for the precise
height definition using modem GPS technology.