Geodetic Control Network Development, Maintenance & Protection
Survey control networks
New Zealand’s survey control system comprises physical control marks and information about them to enable the coordinates of other points to be determined. The control system is segmented into six control networks which provide control marks for specific purposes. more...
Geodetic control pilot
Submit your own geodetic datasets to LINZ via the Geodetic Control Pilot service to make your contribution to improving New Zealand’s geodetic network – and get paid for it! more...
Canterbury earthquake
Download the latest geodetic marks data updated following the Canterbury earthquakes and get the latest information on progress with our re-surveying work and mark analysis and modelling. more...
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.
When LINZ has specified that survey marks are to be reinstated or replaced, this work is required to be carried out and supplied to LINZ as set out in the Specification for the Protection of Survey Marks (PDF 145KB).
An annual maintenance programme is in place to maintain the geodetic survey marks. Feedback from the community regarding damaged geodetic marks and the protective structures is appreciated and can be provided online using the report damage or disturbances 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...
Geodetic control & maintenance recommendation form
Use this form to notify LINZ of marks requiring maintenance or areas requiring additional geodetic control. 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...
