This consolidated dataset consists of Australian Hydrographic Service (AHS) surveys HI621A and HI545 converted to International Terrestrial Reference Frame 2000 (ITRF2000) horizontal datum with Z conversion values for multiple height datums. The data was provided to the Australian Antarctic Division by Paul Digney of Jacobs consulting in February 2021. Included survey datasets: - HI621A.shp (Validated folder) - 1812_5093-HI621A_CASEY_Terrestrial.shp - QC_HI545_12pt5_appraised All data are in horizontal datum ITRF2000 and have been combined into a single ESRI geodatabase feature class titled AHS_Surveys_Casey_ITRF2000. Attribute data shows quality information, conversion factors (shift in metres) for multiple datums and the MSL orthometric height for Casey: Column Name, Alias, Meaning Easting, Easting, Easting ITRF2000 Northing, Northing, Northing ITRF2000 CD_To_GRS8, CD_To_GRS80, LAT (Chart Datum) to the Ellipsoid CD_TO_MSL_Casey, CD_To_MSL_Casey, Ellipsoid to Casey MSL Z_To_GRS80, Z_To_GRS80, Height to the Ellipsoid Z_To_MSL_Casey, Z_To_MSL_Casey, Local MSL orthometric height Vert_Uncer, Vertical_Uncertainty, How good is the Vertical Position Horiz_Unce, Horizontal Uncertainty, How good is the Horizontal Position Uncertaint, Uncertainty Comments, Depth_Comm, Depth_Comments, Vertical uncertainty ranges from 0.05 to 0.64 m and horizontal uncertainty ranges from 0.05 to 1.0 m See the attached document ‘Metadata Record Casey Final.xlsx’ for further details.

The RAN Australian Hydrographic Service conducted hydrographic survey HI468 at Davis, January to March 2010. The survey was conducted jointly with Geoscience Australia and the Australian Antarctic Division. The main survey area was near Davis but additional survey lines were followed to Long Fjord to the north and to Crooked Fjord and the Sorsdal Glacier in the south. The survey dataset, which includes the Report of Survey, was provided to the Australian Antarctic Data Centre by the Australian Hydrographic Office and is available from the Australian Antarctic Data Centre by request. The RAN Australian Hydrographic Service team was lead by LCDR R.D.Bowden. The data are not suitable for navigation. Geoscience Australia produced bathymetric and backscatter gridded datasets from the survey data which are available via the metadata record 'Coastal seabed mapping survey, Vestfold Hills, Antarctica, February-March 2010' with Entry ID: Davis_multibeam_grids. The Australian Antarctic Division produced two bathymetric maps from the survey data. See Related URLs in this metadata record.

The RAN Australian Hydrographic Service conducted hydrographic survey HI242 at Macquarie Island in November and December 1996. The main survey areas were Buckles Bay and Hasselborough Bay. Survey lines were also followed from Elliott Reef down the west coast to Langdon Bay and down the east coast to Buckles Bay. The survey dataset, which includes metadata, was provided to the Australian Antarctic Data Centre by the Australian Hydrographic Office and is available for download from a Related URL in this metadata record. The survey was lead by LT M.A.R.Matthews. The data are not suitable for navigation.

The AADC (Australian Antarctic Data Centre) is in the process of converting all internally held spatial datasets to the ITRF2000 horizontal datum. This consolidated dataset consists of surveys HI623_alatB_gg, HI625_alatB_GG, HI632_alat_B_gg, HI632_alat_C_gg, LADSII_MMI20756_HSDB_T0001_SD_100029052_op, LADSII_MMI20756_HSDB_T0001_SD_100029053_op, LADSII_MMI20756_HSDB_T0001_SD_100029054_op converted to ITRF2000 horizontal datum with Z conversion values for multiple height datums. The data was provided to the AAD by Paul Digney of Jacobs consulting in March 2021. Included survey datasets: • HI623_alatB_gg • HI625_alatB_GG • HI632_alat_B_gg • HI632_alat_C_gg • LADSII_MMI20756_HSDB_T0001_SD_100029052_op • LADSII_MMI20756_HSDB_T0001_SD_100029053_op • LADSII_MMI20756_HSDB_T0001_SD_100029054_op All data are in horizontal datum ITRF2000 and have been combined into a single ESRI geodatabase feature class titled AHS_Surveys_Macca_ITRF2000. Attribute data shows quality information, conversion factors (shift in metres) for multiple datums and the MSL orthometric height: Column Name Alias Meaning Easting Easting Easting ITRF2000 Northing Northing Northing ITRF2000 LAT_to_GRS LAT_to_GRS LAT (Chart Datum) to GSR80 LAT_to_Mac LAT_to_Mac LAT to Macca MSL Z_To_GRS80 Z_To_GRS80 Height to the Ellipsoid Z_To_Macca Z_To_Macca Local MSL orthometric height Vertical_U Vertical_U How good is the Vertical Position Horizontal Horizontal How good is the Horizontal Position Uncertaint Uncertaint Uncertainty Comments Depth_Comm Depth_Comments Vertical uncertainty ranges from 0.5 to 1.2 m and horizontal uncertainty ranges from 2 to 5.5 m. Null values indicate unknown uncertainty. See the attached document ‘Metadata_Record_Macqaurie Island Final.xlsx’ for further details.

The RAN Australian Hydrographic Service conducted hydrographic survey HI560 at Casey, December 2014 to February 2015. The survey was conducted jointly with Geoscience Australia. The survey area was offshore from Clark Peninsula south to Beall Island, but not including Newcomb Bay and O'Brien Bay which were surveyed in 2013/14 (see the metadata record with ID HI545_hydrographic_survey). A multibeam sonar system was used. The survey dataset, which includes the Report of Survey, was provided to the Australian Antarctic Data Centre by the Australian Hydrographic Office. The RAN Australian Hydrographic Service team was lead by LCDR G.A.Walker. The data are not suitable for navigation.

The RAN Australian Hydrographic Service conducted hydrographic survey HI514 at Mawson, February to March 2012. The areas surveyed were the entrance to Horseshoe Harbour and the western side of West Arm. There is also a single line of soundings east of Evans Island. The survey dataset, which includes the Report of Survey, was provided to the Australian Antarctic Data Centre by the Australian Hydrographic Office and is available for download (see a Related URL). The vertical datum of the soundings is Lowest Astronomical Tide, 0.83 metres below Mean Sea Level. The survey was lead by LT C.E.Diplock. The data are not suitable for navigation.

The RAN Australian Hydrographic Service conducted hydrographic survey HI364 at Mawson, January to March 2003. The survey areas were north-west and south-west of the station. The survey dataset, which includes metadata, was provided to the Australian Antarctic Data Centre by the Australian Hydrographic Office and is available for download from a Related URL in this metadata record. The survey was lead by LCDR M.B.Rigby. The data are not suitable for navigation.

The RAN Australian Hydrographic Service conducted hydrographic survey HI350 at Mawson, January to March 2002. The survey area was north of the station between Williams Rocks and Parallactic Islands and also at Moller Bank. The survey dataset, which includes metadata, was provided to the Australian Antarctic Data Centre by the Australian Hydrographic Office and is available for download from a Related URL in this metadata record. The survey was lead by LCDR M.Pounder. The data are not suitable for navigation.

The RAN Australian Hydrographic Service conducted hydrographic survey HI256 at Casey, February to March 1997. The survey areas were north-west of the station near the Frazier Islands and Donovan Islands and south-west of the station between Beall Island and Holl Island. The survey dataset, which includes metadata, was provided to the Australian Antarctic Data Centre by the Australian Hydrographic Office and is available for download from a Related URL in this metadata record. The survey was lead by LT M.A.R.Matthews. The data are not suitable for navigation.

The RAN Australian Hydrographic Service conducted an airborne hydrographic survey LADSII at Macquarie Island, February to March 1999. The areas surveyed included the northern coast between Handspike Point and Garden Bay and an area in the vicinity of Judge and Clerk Islets north of Macquarie Island. The survey dataset, which includes metadata, was provided to the Australian Antarctic Data Centre by the Australian Hydrographic Office and is available for download from a Related URL in this metadata record. The survey was lead by M.J.Sinclair. These data are not suitable for navigation.