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Description:
The Canadian Geoid Model GSD91 has been developed at the Geodetic Survey Division
of Natural Resource Canada (http://www.nrcan.gc.ca). This gravimetric model extends from 41°N to 72°N
and from 46°W to 142°W with a grid spacing of 5'. It is computed using the fast-fourier transform (FFT)
with a standard (planar) Stokes kernel, as well as the remove-restore technique. In particular the OSU91A
global gravity model is used along with new digital elevation model data over various regions of the
country. The geodetic reference system is NAD83. The geoid model is validated using GPS/levelling data,
showing differences with a mean of -79.4 cm and a standard deviation of 79 cm, which goes down to 69.5 cm after filtering out systematic errors.
References:
M. Veronneau, A. Mainville (1992). Computation of a Canadian geoid model using the FFT technique to evaluate
Stokes' and Vening-Meinesz' formulas in a planar approximation. Presented at the AGU-CGU-MSA
Joint Spring Meeting, Montreal, Quebec, May 12-16.
Web of Science ID:
DRCI:DATA2014029004232819
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