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  • Author or Editor: M. Kuhar x
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The paper presents some methods of transforming ETRS89 co-ordinates to official Slovenian datum (D48)  co-ordinates. Together with traditional transformation methods of scaling, translation and rotation least squares collocation is also used. The results of different transformation procedures between the astrogeodetic network and global co-ordinate system (ETRS89) show a lot of the drawbacks of existing national co-ordinate frame.

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The paper presents all stages of the development and processing of the fundamental gravimetric network of Slovenia, which consists of a zero order network, which has six absolute gravity stations, and twenty nine first order gravimetric stations. Descriptions are given of the design of the network, the geological assessment of the gravimetric stations, the gravity survey of the first order network, and the post-processing and adjustment of the gravimetric observations, which was performed in two stages. First the observations in the zero order network were adjusted as a free network, and then a standard adjustment of the first order network was performed. Finally, the adjusted gravity values at the stations were analysed against the Potsdam system, which was the basis of all previous gravimetric calculations in Slovenia. In the analyses an equation for the transformation of gravity values between the Potsdam system and the IGSN71 system (International Gravity Standardization Network 1971) has been derived.

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