Category A Hydrographic Surveying
Links
International Hydrographic Organization
Land Information New Zealand (LINZ) Hydrographic Service
Australasian Hydrographic Society
The International Federation of Hydrographic Societies
New Zealand Institute of Surveyors
Spatial Sciences Institute (Australia)
Australian Hydrographic Service
The Hydrographic Society New Zealand Region
FIG Commission 4 - Hydrography