Geodetic Network Development, Maintenance & Protection

Protection & maintenance of survey marks

Thousands of vital survey marks exist in New Zealand - many are below ground level and invisible to most of us. It is in everyone's interest to take care of survey marks and protect them from damage.

When construction works have the potential to destroy existing cadastral and geodetic marks LINZ needs to be notified to assess whether the marks need to be reinstated or replaced. The Specifications for Reinstating or Replacing Geodetic Marks (PDF 145KB) covers who can perform this work and the standard to which the work is to be carried out.

An annual maintenance programme is in place to maintain the geodetic survey marks. Feed back from the community regarding damaged geodetic marks and the protective structures is appreciated and can be provided online using the report damage or distrubances to survey marks form.

View the Survey Mark Protection Brochure (PDF 323KB).

Report damage or disturbances to survey marks

Use this form to notify LINZ about damaged survey marks and trig stations or any likely disturbance or destruction of the marks and their surroundings. more...

Annual programme

LINZ carries out annual geodetic control surveys to upgrade existing marks and extend control into developing areas. more...

Geodetic service contracts

Each year LINZ contracts out geodetic survey control and mark maintenance. Contractors for this work are selected through a tendering process. more...