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Unusually high or low barometric pressure, or prolonged periods of strong winds, can mean the actual sea level is higher or lower than the predicted height.

Until quite recently the use of float gauges was the most common method of measuring and recording sea levels.

New Zealand and Australia have rights over areas of ocean called their Exclusive Economic Zones (EEZ).

This page lists the transformation factors that are used in the 3-parameter and 7-parameter similarity transformations between New Zealand Geodetic Datum 1949 (NZGD1949) and New Zealand Geodetic Datum 2000 (NZGD2000).

The transformation grid method can be used to change horizontal coordinates between New Zealand Geodetic Datum 1949 (NZGD1949) and New Zealand Geodetic Datum 2000 (NZGD2000).

The mathematical equations used to convert coordinates between vertical datums.

Three different datum transformation methods can be used for transformation between NZGD1949 and NZGD2000.

Chatham Islands Geodetic Datum 1979 (CIGD1979) coordinates can be converted to New Zealand Geodetic Datum 2000 (NZGD2000) using a 7-parameter similarity transformation.

How to prepare and start using Web Search in new Landonline.

If you’re not an existing New Landonline or Legacy Landonline user, you need to be set up as a new user before you can use Landonline Web Search.

A glossary of terms and acronyms that relate to New Zealand's land survey and registration system.

Selected workshops hosted by Toitū Te Whenua, relating to geodesy in New Zealand.

Practical guidance for firms wishing to settle when there is a Landonline system outage.

Download New Zealand’s maritime boundaries

Find out why and how to consult with Māori when making a place name proposal.

Information for landowners wanting to register land transactions themselves, withhold or restrict access to land records, and learn more about a notice they have received about their land.

Available hours, fees and how to access Land Record Search to order land records.

How to use the map in Land Record Search to find and order titles, surveys and other records.

How to buy a title in Land Record Search.

View a list of titles in cards or tables in Land Record Search.

Register for a Koordinates ID to start downloading data from the LINZ Data Service.

Find out about our enforcement approach, our strategic priorities, and the enforcement action we have taken. You can also report a suspected breach of the Overseas Investment Act.

Standards and specifications for carrying out hydrographic surveys for safety of navigation, and the benefits of hydrographic survey data.

Information about registration requirements, how to prepare a transmission to an administrator, and vesting under Grand Lodge statutes.

We support mapping, surveying, and the use of spatial data by providing coordinate systems for New Zealand and our offshore islands, the Chatham Islands and Antarctica.

Tidal levels for standard ports, information on reading tide predictions, and the standard port datum descriptions for New Zealand ports.

Standards, rules and guidelines for Crown property.