oa Civil Engineer in South Africa - Establishing a higher-order survey system for outside control of the tunnel project
|Article Title||Establishing a higher-order survey system for outside control of the tunnel project|
|© Publisher:||South African Institution Of Civil Engineering (SAICE)|
|Journal||Civil Engineer in South Africa|
|Author||D.P.M. Rousseau and A.J.T. Hough|
|Publication Date||Jan 1988|
|Pages||171 - 173|
With complete triangulation cover, approximately 60 per cent of which is down to tertiary or third order density, South Africa prides itself on being one of the few countries in the world and the only one on the African continent with a fully integrated survey system. Though this national control ensures that cadastral, road, canal, dam basin and other major engineering surveys are performed on a common system, the quality of this network, especially the inherent scale, does not normally satisfy the standard of internal accuracy necessary for extensive intricate construction projects.
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