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A tale of two feet: NOAA moves to more precise positioning

October 7, 2019

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measurements and observations

NOAA surveyors Charles Geoghegan and Benjamin Erickson conducting a geodetic surveying project in Colorado in the summer of 2017. NOAA and the National Institute of Standards and Technology (NIST) are retiring the U.S. survey foot and standardizing to now use the international foot.

How GPS works: The National Spatial Reference System

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A composite satellite image of the Earth at night.

Podcast: Geodesy, the invisible backbone of navigation

January 19, 2018

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

What is geodesy?

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A geodesist on the National Mall looking through a surveying device.

Flying high to measure gravity: Humans optional

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NOAA is exploring using unmanned aircraft to more efficiently collect gravity data around the nation.