Abstract. The integrity of the Australian Height Datum (AHD) has remained in some question ever since its adoption in 1971. Indeed, its creators com-mented that using 30 tide gauges ‘placed a strain ’ on the least-squares network adjustment of the ~97,230 km of spirit levelling used to realise the AHD. Al-though the AHD seems to have served Australians well, the question remains – can the AHD be improved? Of course, re-levelling an entire continent the size of Australia is prohibitively expensive, especially in the current climate of eco-nomic rationalism. Therefore, a proposal is made to enhance and redefine the AHD using the additional levelling data collected since 1971, mean sea level observations made at new tide gauges, models of the sea-surface topography, nation-wide GPS height networks and a regionally refined gravimetric geoid model. This proposal is balanced against the argu-ments in favour of retaining the existing AHD, cou-pled with a geoid model that has been warped to fit the existing AHD using nation-wide GPS networks co-located with AHD benchmarks.
CITATION STYLE
Featherstone, W. E. (2002). Prospects for the Australian Height Datum and Geoid Model (pp. 96–101). https://doi.org/10.1007/978-3-662-04709-5_17
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