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Regional Models

Europe (EGG97)


  Authors: H. Denker, W. Torge     Created: 1997    Resp: H. Denker  
      Status: PUBLIC    

Description:
The EGG97 geoid and quasigeoid data are stored in gridded form in the ASCII files g_g10m15m and qg_g10m15m, respectively. The grid spacing of these files is 10' x 15'. The full resolution files (1.0' x 1.5') are not available as public domain data and must be obtained through the IAG Secretary General (see http://www.gfy.ku.dk/~iag/egg97.html). At the beginning of each file there is a grid label with the min. and max. latitude and longitude of the grid area as well as the grid spacing in latitude and longitude direction (units are degrees). The grid values are given in rows from West to East. The rows are given from North to South. Thus, the first data value refers to the NW corner of the grid, and the last data value refers to the SE corner of the grid. The grid values are given in mm. The Fortran format is 10i7. The values refer to GRS80 and the zero tide system (as recommended by IAG).

References:
H. Denker, W. Torge (1998). The European Gravimetric Quasigeoid EGG97 - An IAG Supported Continental Enterprise. In: R. Forsberg, M. Feissel, R. Dietrich (eds.), Geodesy on the Move - Gravity, Geoid, Geodynamics and Antarctica, IAG Symposia Series, vol. 119, pp. 249-254, Springer Verlag.

Europe