Survey Control

ASL provides services to assist with the mapping of the New Zealand seabed. Services generally involve the establishment of survey control marks- (sometimes in very remote places) to enable accurate position and height for the mapping requirements.

We also provide survey control mark replacement and maintenance services to LINZ as well as local contractors who find that their construction works will interfere with these legally protected control marks.


National Institute of Water and Atmospheric Research
National Institute of Water and Atmospheric Research