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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).

We collect tax-related data under the Land Transfer Act 2017 when people buy, sell or transfer property. The legislation also requires us to ask questions that help inform housing policy. This page contains answers to questions about this data.

Key guidance for practitioners to ensure they are aware of their certification obligations in regard to consent requirements.

This page outlines a number of scenarios which detail how property tax compliance requirements apply.

The New Zealand Vertical Datum 2016 provides a nationally consistent height reference surface. This is an important tool for planning, consenting, and infrastructure works.

New Zealand Vertical Datum 2016 (NZVD2016) is the official vertical datum. It is used to define heights in New Zealand and its offshore islands.

This section provides information for cadastral surveyors working in greater Christchurch.

Geodetic technical reports commissioned by or produced for Toitū Te Whenua.

Many heights around New Zealand have been referenced to a local sea level, or local vertical datum (LVD). In the past this was the most practical method of determining a height reference point, but more robust height references are now available to replace these.