SDC status is given to a node if it is determined to be accurate in relation to the datum and those nodes around it. SDC status indicates the coordinates comply with the accuracy standards of the Rules for Cadastral Survey.
The SDC status also supports a number of semi-automatic validation checks within the Landonline environment. For instance, one of the least-squares validation adjustments of a new survey hold SDC nodes as fixed points, assessing how well its observations agree with the existing record.
NOTE: SDC status marks can be viewed in the Landonline spatial view by selecting and applying the layer: Marks/NZGD2000/NZGD2000-SDC.