1. Australian Antarctic Data Centre
2. Discover and Manage Data
3. Records
4. AHS_Surveys_Davis_ITRF2000

Description

This consolidated dataset consisting of Australian Hydrographic Service (AHS) surveys HI468, HI590, HI621 and HI634 converted to International Terrestrial Reference Frame 2000 (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 February 2021.
Included survey datasets:
- HI468_Davis_Z43_Appraised_Part_ITRF2000
- HI468_Davis_Z44_Appraised_ITRF2000
- HI590_Davis_Part_ITRF2000
- HI621B_Davis_Merged_ITRF2000
- HI634_Davis_AreaA_ITRF2000
- HI634_Davis_AreaD_ITRF2000
- HI634_Davis_AreaF_ITRF2000
- HI634_Davis_AreaI_ITRF2000
- HI634_Davis_AreaJ3_ITRF2000
- HI634_Davis_AreaJ4_ITRF2000
- HI634_Davis_Rocks_ITRF2000

All data are in horizontal datum ITRF2000 and have been combined into a single ESRI geodatabase feature class titled AHS_Surveys_Davis_ITRF2000.
Attribute data shows quality information, conversion factors (shift in metres) for multiple datums and the MSL orthometric height in the Davis 83 datum:

Column Name Alias Meaning
Easting, Easting, Easting ITRF2000
Northing, Northing, Northing ITRF2000
CD_To_GRS8, CD_To_GRS80, LAT (Chart Datum) to the Ellipsoid
GRS80_To_D, GRS80_To_DAVIS83_MSL, Ellipsoid to DAVIS Height Datum 83
Z_To_GRS80, Z_To_GRS80, Height to the Ellipsoid
Z_To_DAVIS, Z_To_DAVIS83_MSL, Local MSL orthometric height (DAVIS Height Datum 83)
Vertical_U, Vertical_Uncertainty, How good is the Vertical Position
Horizontal, Horizontal Uncertainty, How good is the Horizontal Position
Uncertaint, Uncertainty Comments,
Depth_Comm, Depth_Comments,

Vertical uncertainty is 0.24 to 0.5 m for hydrographic values and 0.25 to 0.5 m for terrestrial values.
See the attached document ‘Metadata_Record_Davis_Final (002).xlsx’ for further details.

These data were updated in August, 2023 to add a csv version of the data.

Purpose

The AADC (Australian Antarctic Data Centre) is in the process of converting all internally held spatial datasets to the ITRF2000 horizontal datum

Quality

Vertical uncertainty is 0.24 to 0.5 m for hydrographic values and 0.25 to 0.5 m for terrestrial values.

Access

These data are publicly available for download from the provided URL.

Temporal Coverages

• Start date: 2010-03-01 - Stop date: 2020-02-01

Spatial Coverages

Science Keywords

• EARTH SCIENCE > OCEANS > BATHYMETRY/SEAFLOOR TOPOGRAPHY > BATHYMETRY

Use Constraints

This data set conforms to the CCBY Attribution License (http://creativecommons.org/licenses/by/4.0/).

Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=AHS_Surveys_Davis_ITRF2000 when using these data.