Note: this guideline is issued by the Surveyor-General under section 7(1)(ga) of the Cadastral Survey Act 2002 about the Rules for Cadastral Survey 2010 and is not legally binding.

This article relates to datum information that is required to be included in a CSD under rule 9.2.

Horizontal datum information

A CSD Plan must identify the horizontal datum and projection used [r 9.2(a)].

No reference is required in a CSD to coordinate values or an origin of horizontal coordinates.

Vertical datum information    

Where a reduced level is used to mathematically describe a stratum boundary, the CSD Plan must include the vertical datum [r 9.2(b)].

Where a reduced level is used, the CSD must include information on the origin of the heights [r 8.1(f)].

Where an existing stratum boundary is being adopted in terms of rule 19 (Use of existing unit and lease parcel boundaries), the Diagram of Survey must include the:

  • height datum
  • heighted non-boundary marks with their reduced levels (they may have been noted as bench marks)
  • reduced levels of the stratum boundary. 
Last Updated: 7 April 2017
Authority: Surveyor-General - Section 7(1)(ga) of the Cadastral Survey Act 2002
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