Evaluation of the accuracy of the SAGEOID 2010 model in the Cape Peninsula



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Arif Parker, Cape Peninsula University of Technology, South Africa,arifprkr@gmail.com
Kevin Musungu, Cape Peninsula University of Technology, South Africa, MusunguK@cput.ac.za


Survey practitioners are challenged with the dilemma of whether or not to utilize the SAGEOID 2010 model in topographical surveys because they are unsure of the height accuracy attainable from its application. This paper presents an evaluation of the accuracy of the SAGEOID 2010 model in two case study areas in Cape Town. In order to achieve this, the objective was to investigate and compare a relative and absolute verification in terms of height of SAGEOID 2010 model and to clarify the achievable accuracy thereof.

The main purpose of this article is to discuss the accuracy of the SAGEOID 2010 model using GNSS positioning techniques. The SAGEOID 2010 model was used in two study areas in Cape Town within a Virtual Reference Station (VRS) network cluster. The model was verified in both the absolute and relative sense. The results suggest that in the absolute sense, the accuracy improves with shorter baseline lengths from the Continuously Operating Reference Stations (CORS). The results showed a mean of 0.004m and RMS of 0.021m in Rondebosch compared to a mean of 0.023m and RMS of 0.029m in Parow. The two types of verifications confirmed the published accuracy of the SAGEOID 2010. There has been very little published work on the SAGEOID 2010 and this study is intended to contribute towards the geodetic body of research.

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