Author： Obenson G.
Publisher： Maney Publishing
ISSN： 1752-2706
Source： Survey Review, Vol.28, Iss.218, 1985-10, pp. : 207-213
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Abstract
Our better knowledge now of the earth's gravity field, especially in Africa, together with the use of line-integral geoidal equations for geographically defined gravity anomaly blocks, make it possible for us to compute a fairly accurate detailed geoid of Africa. We present here the results of these computations for geoid heights using (20, 20) GEM9 potential coefficients and 1° × 1° mean gravity anomalies. Though the shape of the geoid remains about the same as our 1973 version, the actual values however differ generally by an average of about 20–25 m.
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