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The adoption of a new geocentric datum in Australia has been recently proposed. In accepting this proposal. options for making the transition to the new datum will need to be carefully considered. Spatial data can take various forms. ranging from survey control networks through to plans. maps and digital geographic information systems. All such spatial data will have to be related to the new datum when and if that datum Is adopted. This paper presents some of the options for transforming spatial data to the new Geocentric Datum of Australia.

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