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dc.contributor.authorFeatherstone, Will
dc.date.accessioned2017-01-30T12:22:39Z
dc.date.available2017-01-30T12:22:39Z
dc.date.created2010-03-29T20:04:35Z
dc.date.issued2004
dc.identifier.citationFeatherstone, W.E. 2004. Evidence of a North-South Trend Between AUSGeoid98 and the Australian Height Datum in Southwest Australia. Survey Review. 37 (291): pp. 334-343.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/21018
dc.description.abstract

The AUSGeoid98 gravimetric geoid model has been compared with 48 GPS-levelling points at a ~50 km spacing across part of the southwest of Western Australia. This is arguably the best subset of GPS-derived ellipsoidal heights in Australia with an internally estimated precision of <±9mm. The sprit-levelled heights were tied to the Australian Height Datum (AHD) using class C techniques [12mm-root-km allowable misclose]. The comparisons show that AUSGeoid98 gives a GPS height transformation to the AHD with a precision of ~±13 cm, which is less than reported earlier (~±36 cm) for a nationwide dataset. A clear north-south trend of ~0.81 mm/km [ppm] is also evident in the differences; of which approximately one-third is attributable to a north-south error in the AHD induced by dominant north-south sea surface topography effects at the nearby fixed tide gauges. After removal of this north-south trend, the standard deviation of the differences reduces to ~5 cm.

dc.publisherInstitution of Engineering and Mining Surveyors Australia Inc.
dc.titleEvidence of a North-South Trend Between AUSGeoid98 and the Australian Height Datum in Southwest Australia
dc.typeJournal Article
dcterms.source.volume37
dcterms.source.number291
dcterms.source.startPage334
dcterms.source.endPage343
dcterms.source.issn00396265
dcterms.source.titleSurveying Australia
curtin.note

© W. S. Maney & Son Ltd

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


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