Useful Links

Transformations

Natural Resources, Geodetic Survey Division, Canada
National Transformation version 2 (NTv2) - Products, Software, Grid files

Department of Natural Resources and Mining, Queensland
GDA94: The Datum for Queensland - Distortion grid files

Department of Primary Industries, Water & Environment, Tasmania
AGD66 to GDA94 transformation parameters and grid files

Land and Property Information, New South Wales
Transformations & Software: High Accuracy Transformation - Australian NTv2 Distortion Grid

Intergovernmental Committee on Surveying and Mapping (ICSM), Australia
GDA Technical Manual
Download AGD66-GDA94 Grid File
Download AGD84-GDA94 Grid File

Geodetic Data Services, Department of Land Administration, Western Australia
Geocentric Datum of Australia 1994 (GDA94) - WA Grid File

Land Information, New Zealand
NZGD49 to NZGD2000 Transformations - Similarity Parameters; NTv2 Grid File

Geoid-Spheroid Separation (undulation) and Deflections

Geoscience Australia (Australian Government)
AUSGeoid98 Data Files

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