Abstract
This paper draws attention to the continuing between “permanent” survey co-ordinates and the results more recent surveys of greater accuracy based on ever-improving, modern technology. It suggests the adoption and retention of “local” co-ordinates specifically for limited areas of cadastral and engineering surveys, the connection of these blocks via permanent survey marks to the Australian Geodetic Survey, the continual improvement that Survey and the periodic modernisation of its coordinates, starting with adoption of the Geodetic Model Australia, 1980 (GMA80). An Annex gives brief details of projected developments in satellite geodesy.

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