Hydrography standards and technical specifications

Standards and specifications for hydrographic surveys and the production of nautical charts and publications, and links to International Hydrographic Organization (IHO) resources.

Note

You can search for all regulatory documents using the Resources search (filter by 'Regulatory document').

HYSPEC

Hydrographic surveys carried out for Toitū Te Whenua follow a national standard and specification, known as HYSPEC. This was originally developed in 1999 based on the International Hydrographic Organization (IHO) S-44 Standard for Hydrographic Surveys. The 2020 edition of HYSPEC reflects changes in technologies and processes to future-proof our specifications and lead good practice.

International standards

International standards that apply to our work are available from the International Hydrographic Organisation (IHO).

2020 Good Practice Guidelines for Hydrographic Surveys

Land Information New Zealand and Maritime New Zealand published the 2020 Good Practice Guidelines for Hydrographic Surveys in New Zealand Ports and Harbours on 19 May 2020. This replaces guidance published in 2004.

The revised guideline provides advice on good practice in the commissioning, standards, and delivery of hydrographic surveys in ports and harbours. It outlines the roles and obligations on agencies in the collection, accuracy, storage, and sharing of hydrographic information.

2020 Good Practice Guidelines for Hydrographic Surveys in New Zealand Ports and Harbours

Interpreting electronic navigational charts (ENCs)

Refer to the following catalogues for interpreting objects and attributes of electronic navigational charts (ENCs), which are available from the International Hydrographic Organisation (IHO):

Specifications for contractors

IHO Manual of Hydrography

The IHO publication C-13 Manual on Hydrography is another source of information on sea floor mapping and hydrographic surveys. It is also a tool for teachers and students involved in hydrographic courses or programmes.

IHO capacity building publications

Definitions for Hydrographic Chart Production