Australian Hydrographic Service Surveys at Davis Station - ITRF2000

Full 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.

Lineage

Progress Code: completed

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

Notes

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