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PositioNZ-PP and CSN Marks

PositioNZ-PP can be used to create a cadastral survey network (CSN) or a geodetic mark in areas where there is no efficient way to connect to the datum. Find out how to add these marks to Landonline before a cadastral survey dataset (CSD) is submitted.

Some cadastral survey network (CSN) marks are near a busy road, at the top of a mountain, far away, or damaged by construction, earthquake or landslide. If this makes them unsafe or impractical to occupy, it may be more practical to create a CSN using PositioNZ-PP to connect to New Zealand Geodetic Datum 2000 (NZGD2000).

There may be additional requirements if you require:

  • multiple CSN marks
  • a connection to New Zealand Vertical Datum 2016 (NZVD2016)  
  • an accuracy higher than Order 6. See Coordinate Orders.

Contact CRM_Geodetic@linz.govt.nz to find out more before you start the survey.

For a mark to be assigned Order 6 in Landonline

If you want the mark to be assigned Order 6, you will need:

  • a new or existing mark that meets the requirements of a permanent reference mark (PRM)
  • 2 independent GNSS occupations on that mark (including a change in antenna height), each of at least 1-hour duration
  • measured antenna heights for each occupation, reduced to a vertical distance between the top of the mark and bottom of antenna (heights are not generally required for cadastral surveys, but  PositionNZ-PP data is 3-dimensional)
  • horizontal agreement of better than 0.15m between the 2 independent occupations after processing in PositioNZ-PP vertical agreement of better than 0.20m between the 2 independent occupations after processing in PositioNZ-PP.  

Sending us the data

Once PositioNZ-PP has processed the data, send the following to CRM_Geodetic@linz.govt.nz:

  1. The zip file containing the results of the PositioNZ-PP processing.
  2. A brief description of the mark (for example, iron tube down 0.10m at side of driveway).
  3. If the mark is existing, supply its current name. If the mark is new, suggest an appropriate name for the mark based on a geographical identifier, such as 57 SMITH ROAD (where 57 is the RAPID number of the nearest address). Do not suggest a CSD reference, since the CSD has not yet been approved.

We will add the data to Landonline and generate the new coordinate within 2 working days.

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