INVESTIGATIONS IN THE METHODS OF IMPROVING THE STRENGTH OF NIGERIAN HORIZONTAL GEODETIC CONTROL NETWORK

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dc.contributor.authorUbajekwe, Ray. E.
dc.date.accessioned2014-02-05T11:34:16Z
dc.date.available2014-02-05T11:34:16Z
dc.date.issued2014-02-05
dc.descriptionA Dissertation submitted in partial fulfillment of the requirements for the M.Sc. (Geology) degree of the University of Oxforden_US
dc.description.abstractThe effect of the approximate treatment of geodetic observations on the Nigerian network is described with a view to highlighting its adverse effect on the network. In the approximate treatment of observations, the geoidal undulations and the deviation of the vertical are neglected. Methods are suggested for determining these parameters. The correct procedures for carrying out the reduction of observations are also given. And since unknown systematic, errors usually exist in a network, methods (both computational and observational) are given for the possible ways these errors can be eliminated or minimised. The effect of additional observations on the Nigerian network is evaluated by means of an optimisation technique based on computer simulated observations. A block of the network is used for this purpose and the method of variance-covariance analysis together with the related accuracy criteria is used. Also a brief history of the development of the network is discussed.en_US
dc.identifier.urihttp://hdl.handle.net/123456789/329
dc.language.isoenen_US
dc.subjectINVESTIGATIONS,en_US
dc.subjectMETHODS,en_US
dc.subjectIMPROVING,en_US
dc.subjectSTRENGTH,en_US
dc.subjectNIGERIAN,en_US
dc.subjectHORIZONTAL,en_US
dc.subjectGEODETIC,en_US
dc.subjectCONTROL,en_US
dc.subjectNETWORKen_US
dc.titleINVESTIGATIONS IN THE METHODS OF IMPROVING THE STRENGTH OF NIGERIAN HORIZONTAL GEODETIC CONTROL NETWORKen_US
dc.typeThesisen_US
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