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.
DOI: 10.1007/978-3-642-72245-5_36
Web of Science ID:
DRCI:DATA2014029004232820
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