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dc.contributor.authorFeatherstone, Will
dc.date.accessioned2017-01-30T13:32:54Z
dc.date.available2017-01-30T13:32:54Z
dc.date.created2010-10-03T20:03:22Z
dc.date.issued2000
dc.identifier.citationFeatherstone, Will. 2000. Towards the unification of the Australian Height Datum between mainland and Tasmania using GPS and AUSGeoid98. Geomatics Research Australasia. 73: pp. 33-54.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/32752
dc.description.abstract

The AUSGeoid98 geoid model is used in conjunction with nation-wide GPS networks and spirit-levelled Australian Height Datum (AHD) heights at 1013 points, and subsets thereof, to estimate the vertical offset between the AHD as realised on the Australian mainland [AHD(Mainland)] and in Tasmania [AHD(Tas)]. It appears that the AHD(Tas) is offset below the AHD(Mainland) somewhere between (26±33)cm and (12±12)cm, which is in broad agreement with previous estimates made by Rapp (1994) and Rizos et al. (1991), as well as with long-wavelength sea-surface topography models. However, the estimates of the vertical datum difference are heavily influenced by the spatial distribution of the GPS-AHD control points used, with different offsets being computed according to latitude and proximity to the coast. This is most probably due to the effect of fixing of multiple tide gauges to mean sea level in the adjustment of the AHD. This has implications for any future unification of the AHD(Mainland) and AHD(Tas) into a single, global vertical datum, where the appropriate datum connection points must first be chosen.

dc.publisherInstitution of Surveyors, Australia
dc.subjectVertical datum unification
dc.subjectAustralian Height Datum
dc.subjectgeoid
dc.titleTowards the unification of the Australian Height Datum between mainland and Tasmania using GPS and AUSGeoid98
dc.typeJournal Article
dcterms.source.volume73
dcterms.source.startPage33
dcterms.source.endPage54
dcterms.source.issn13249983
dcterms.source.titleGeomatics Research Australasia
curtin.note

Geomantics Research Australasia has been succeeded by Journal of Spatial Science.

curtin.accessStatusOpen access
curtin.facultyDepartment of Spatial Sciences
curtin.facultyFaculty of Science and Engineering
curtin.facultyWA School of Mines


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