Nairobi County - Kenya
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Authors: P.A. Odera, S.M. Musyoka, M.K. Gachari
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Created: 2014
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Resp: P.A. Odera
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Description:
A local geometric geoid covering Nairobi County and its environs has been determined by a geometric approach. Nineteen points levelled
by both GPS and precise levelling techniques in the area of study have been used. Seven triangulation points have been used for the
determination of transformation parameters between WGS84 and Arc-Datum1960 coordinates in order to express the local geoid height as
a function of position. The geoid height is expressed as a function of the local plane coordinates through a biquadratic surface polynomial,
using fourteen GPS/levelling points. Five points have been used for testing the results, showing a root mean square and standard deviation of
about 1 cm in the area of study. This accuracy is sufficient for most engineering projects.
References:
P.A. Odera, S.M. Musyoka, M.K. Gachari (2014). Practical application of the geometric geoid for heighting over Nairobi County and its Environs.
Journal of Agriculture, Science and Technology, 16(2), pp. 175-185.
Web of Science ID:
DRCI:DATA2018029012462768
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