Glossary · Australian CRS

GDA2020 vs GDA94 — what office reviewers should check

GDA2020 is Australia's current geodetic datum; GDA94 is largely superseded. SurveyMarkup can surface declared datum metadata for review — it does not transform or certify coordinates.

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Advisory and unverified — not for survey deliverables. A registered surveyor must confirm any output before it is relied on.

Why datum metadata matters

Mixing GDA94 and GDA2020 labels on one job is a common source of downstream export errors.

What SurveyMarkup flags

Declared datum strings and GDA/AUSGeoid pairings are checked for presence and plausibility — not correctness.

Professional confirmation required

Datum transforms and legal survey positions remain the registered surveyor's responsibility.

Related next steps

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Preview CRS in Map Linework

Advisory and unverified — not for survey deliverables. A registered surveyor must confirm any output before it is relied on.