Science Keywords>SOLID EARTH
The Australian Antarctic Geodetic NetworkEntry ID: AAGN
Abstract: The Australian Antarctic Geodetic Network (AAGN) consists of geodetic positions (latitudes and longitudes) of permanent survey marks on stable rock. The positions are computed from a network of older conventional geodetic survey observations (angles and distances) and more recent high precision GPS measurements. All observations have been adjusted in terms of the global coordinate system (the ... International Terrestrial Reference Frame) which is compatible with WGS84 for most practical applications. The information held includes:
Unique station identifier,
Station Type (e.g. trig station, bench mark, permanent tracking station),
Station coordinates (e.g. latitude and longitude and height),
Coordinate datum (e.g. ITRF, WGS84 or astronomical),
Coordinate epoch (e.g. 1998.0),
Related Site details:
Mark type (e.g. stainless steel pin in rock),
Status of mark (e.g. found, disturbed, destroyed),
Allied information (e.g. photographs or sketches).
Optical levelling connections from permanent GPS reference stations to tide gauges are also available.
This work is part of ASAC project 1159 (ASAC_1159).
A copy of a presentation detailing geodesy work undertaken as part of PCMEGA is available for download.
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Start Date: 1954-01-01
ISO Topic Category
Quality Because the AAGN only includes geodetic sites on stable rock, the coverage is limited to such areas. In addition, the majority of the network is from Mawson to the South Prince Charles Mountains, west to Enderby Land and a spur to Davis. There are other small quantities of control in the coastal regions of the AAT and at Casey and Commonwealth Bay. The AAGN is an accumulation of geodetic survey ... observations since 1954. They have regularly been adjusted to provide positions on a variety of datums, but the latest ITRF positions supersede all previous positions for these sites. All the geodetic sites in the AAGN are uniquely linked to other attributes in a relational database. The accuracy of the positions depends on the vintage, type and geometric position of the observations used. It varies from metres for older observations in difficult areas, to centimetres for positions derived from modern, well configured GPS.
Access Constraints These data are publicly available for download from the URL given below.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AAGN when using these data.
Data Set Progress
Distribution Media: HTTP
Distribution Size: 10 MB
Distribution Format: pdf
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Phone: +61 2 6249 9049
Fax: +61 2 6249 9929
Email: gary.johnston at ga.gov.au
Geodetic Operations Geoscience Australia Earth Monitoring Group (GEM) Geoscience Australia GPO Box 378
Province or State: Australian Capital Territory
Postal Code: 2601
Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date: 1999-10-07
Last DIF Revision Date: 2013-01-22