Geodesy icon - a globe


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

An airplane flying over a coastal area
A Global Positioning System is set up on a benchmark in Shell Beach, Louisiana.
a map of coastal areas
A LIDAR (Light Detection and Ranging) image created with data collected by NOAA's National Geodetic Survey
a geodesist in the field
NOAA's National Geodetic Survey employees level to a pier as part of a larger island-wide project to provide St. Thomas, U.S. Virgin Islands with a vertical datum