noaa.gov
The nation's ocean and coastal agency: Supporting coastal communities, promoting a robust economy, and protecting coastal and marine ecosystems
oceanographic conditions in Chesapeake Bay sonar image Illustration of whale and soundwaves Monterey Bay tidal pool visualization of dead zone in Gulf of Mexico
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OCEAN FACT
What is a geodesy?

Geodesy is the science of accurately measuring and understanding the Earth's geometric shape, orientation in space, and gravity field.

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VIDEO PODCAST
Making Waves

Get a close-up look at the microwave radar water level sensor—a revolutionary step forward in how NOAA measures water levels around the nation.

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About NOS

The National Ocean Service (NOS) translates science, tools and services into action, to address threats to coastal areas such as climate change, population growth, port congestion, and contaminants in the environment, all working towards healthy coasts and healthy economies.

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Miami coastline

Coasts

Supporting healthy, resilient coastal communities.

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Midway Atoll

Oceans

Protecting the health, productivity, and diversity of our ocean.

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NOAA Coast Survey vessel

Navigation

Navigation, tides, currents, and geodesy.

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