GPS Coordinate Transformations and their Use in Gravimetry

W.E. Featherstone

doi:10.1071/EG993487

ISSN: 0812-3985
E-ISSN: 1834-7533

GPS Coordinate Transformations and their Use in Gravimetry
Authors W.E. Featherstone^a
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^a School of Surveying and Land InformationCurtin University of Technology, GPO Box U1987 Perth, , WA, 6001
Publisher: Australian Society of Exploration Geophysicists
Source: Exploration Geophysics, Volume 24, Issue 3-4, Sep 1993, p. 487 - 491
DOI: https://doi.org/10.1071/EG993487
- Published online: 01 Sep 1993

Abstract

Geodetic coordinates on Australian maps are referenced to the Australian Geodectic Datum 1984 (AGD84). Topographic elevations are referred to the Australian Height Datum (AHD). Conversely, GPS yields 3-D Cartesian coordinates and coordinate differences in the World Geodetic System 1984 (WGS84).

The difference between coordinates of the same point on the Earth's surface varies between 150 m to 200 m over continental Australia. This study presents a method of transforming between GPS (WGS84) and AGD84 latitude, longitude and AHD. This permits GPS-aided gravity data to be integrated with other geophysical data referred to the AGD84. A new rigorous formula to simultaneously determine the latitude, free-air and slab Bouguer corrections from GPS and geoid information is derived. It is demonstrated that, if an incorrect elevation datum is used for gravimetric data reduction, a different gravity anomaly is produced.

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1993-09-01

2026-01-15

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References

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Higgins, M. (1987), ‘Transformation from WGS84 to AGD84: an interim solution’. Department of Geographic Information, University of Queensland.
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Article Type: Research Article

Keyword(s): coordinate transformations; GPS; gravimetry

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GPS Coordinate Transformations and their Use in Gravimetry

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