1measures the water environment and
anticipates change.
Hydrography
2Measurement and description of the physical features of oceans, seas, coasts,
lakes, and rivers, together with prediction of how they change over time.
Hydrography
3Primarily for
Safe and efficient navigation
4other purpose of hydrographic survey
to support economic development, security and
defence, scientific research, and environmental protection.
5decisions
The survey’s purpose is fulfilled when measurements become
6determine whether the final
product can be trusted.
Accuracy, completeness, currency, and clear metadata
7What are done for safe navigation
Chart navigable depth, Locate hazards, Support port access, Keep information current
8Hydrographic surveying beyond navigation
Coastal infrastructure, Environmental management, Disaster risk reduction, Maritime jurisdiction, Blue economy & tourism, Science & modelling
9A hydrographic product integrates…
Geodesy and positioning
Water levels and physical oceanography
Acoustic depth measurement
Seabed and sub-bottom interpretation
Cartographic communication
10Mariner / port authority User what products
Nautical chart; least depths; hazards
11Engineer / contractor User what products
Bathymetric surface; cross-sections; volumes
12Coastal planner / DRRM
office what product do they use
Terrain–bathymetry model; shoreline change
13Environmental manager what product do they use?
Seabed character; habitat and change layers
14Researcher / modeler What product do they use?
Quality-controlled depths and metadata