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dc.contributor.authorFilmer, Michael
dc.contributor.authorFeatherstone, Will
dc.contributor.authorKuhn, Michael
dc.date.accessioned2017-01-30T10:40:56Z
dc.date.available2017-01-30T10:40:56Z
dc.date.created2010-07-15T20:03:11Z
dc.date.issued2010
dc.identifier.citationFilmer, M.S. and Featherstone, W.E. and Kuhn, M. 2010. The effect of EGM2008-based normal, normal-orthometric and Helmert orthometric height systems on the Australian levelling network. Journal of Geodesy. 84 (8): pp. 501-513.
dc.identifier.urihttp://hdl.handle.net/20.500.11937/4685
dc.identifier.doi10.1007/s00190-010-0388-0
dc.description.abstract

This paper investigates the normal-orthometric correction used in the definition of the Australian Height Datum, and also computes and evaluates normal and Helmert orthometric corrections for the Australian National Levelling Network (ANLN). Testing these corrections in Australia is important to establish which height system is most appropriate for any new Australian vertical datum. An approximate approach to assigning gravity values to ANLN benchmarks (BMs) is used, where the EGM2008-modelled gravity field is used to "re-construct" observed gravity at the BMs. Network loop closures (for first- and second-order levelling) indicate reduced misclosures for all height corrections considered, particularly in the mountainous regions of south eastern Australia. Differences between Helmert orthometric and normal-orthometric heights reach 44 cm in the Australian Alps, and differences between Helmert orthometric and normal heights are about 26 cm in the same region. Normal orthometric heights differ from normal heights by up to 18 cm in mountainous regions >2,000 m. This indicates that the quasigeoid is not compatible with normal-orthometric heights in Australia.

dc.publisherSpringer - Verlag
dc.subjectAHD
dc.subjectVertical datums
dc.subjectEGM2008
dc.subjectHeight systems
dc.titleThe effect of EGM2008-based normal, normal-orthometric and Helmert orthometric height systems on the Australian levelling network
dc.typeJournal Article
dcterms.source.volume84
dcterms.source.number8
dcterms.source.startPage501
dcterms.source.endPage513
dcterms.source.issn09497714
dcterms.source.titleJournal of Geodesy
curtin.note

The original publication is available at : http://www.springerlink.com

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


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