Supported datums are listed in the etc\datum.txt file in your CATALYST Professionalinstallation directory. The datum code (for example, D000) can be specified for the Earth model.
Some datums use grid files of datum shifts (NADCON, US North American Datum CONversion; format; NADCON 5 nadcon5.*.b format; NTv1, Canadian National Transformation, Version 1 format; NTv2, Canadian National Transformation, Version 2 format; NTv2, Australian National Transformation, Version 2 format).
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