This layer identifies critical survey marks which Toitū Te Whenua (Land Information New Zealand) requires to be physically protected. Thousands of vital survey marks exist in New Zealand. This layer identifies critical survey marks that should not be disturbed or destroyed. Like utilities such as cables and pipes, survey marks are valuable assets, predominately in the road reserve, with many survey marks set below or at ground level and therefore not highly visible or apparent. They often remain unnoticed until roads or footpaths have been excavated and the survey marks disturbed or destroyed. Publication of the NZ Protected Survey Marks dataset enables the potential for disturbance or destruction of these valuable survey marks to be assessed, and if needed, the marks protected prior to the commencement of any excavation work. People involved in construction, from design to the works itself, are responsible for ensuring that survey marks are not disturbed or destroyed. When works have the potential to disturb or destroy existing cadastral and geodetic marks, Toitū Te Whenua needs to be notified so that it can assess whether the marks should be reinstated or replaced. Find out more about looking after the [national survey network](https://www.linz.govt.nz/data/geodetic-system/geodetic-control-network-development-maintenance-and-protection), and how to contact the Toitū Te Whenua [Survey Protection Advisory Service](https://www.linz.govt.nz/data/geodetic-services/search-for-geodetic-marks/survey-mark-protection). Please note there may be other important survey marks not identified on this layer, and that Toitū Te Whenua recommends consultation with a Licensed Cadastral surveyor before any construction or earthworks begin. If you notice a damaged survey mark, you can report it to Toitū Te Whenua by filling out a form on this [website](https://www.linz.govt.nz/data/geodetic-services/search-for-geodetic-marks/survey-mark-protection), or by sending feedback via the [Geomarks App](https://www.linz.govt.nz/data/geodetic-services/geodetic-marks-app).

This layer identifies critical survey marks which LINZ requires to be physically protected. Thousands of vital survey marks exist in New Zealand. Many of them are below or at ground level and not noticed by most of us. People involved in construction work are responsible for making sure survey marks are not damaged. When building works have the potential to destroy existing cadastral and geodetic marks, LINZ needs to be notified so that it can assess whether the marks should be reinstated or replaced. Find out more about looking after the [national survey network](http://www.linz.govt.nz/geodetic/geodetic-programme) Please note there may be other important survey marks not identified on this layer, and that LINZ recommends consultation with a Licensed Cadastral surveyor before any construction or earthworks begin. If you notice a damaged survey mark, you can report it to LINZ by filling out a form on this [website](http://www.linz.govt.nz/geodetic/geodetic-programme/mark-maintenance)