U.S. flag An official website of the United States government.

dot gov icon Official websites use .gov

A .gov website belongs to an official government organization in the United States.

https icon Secure websites use HTTPS

A small lock or https:// means you’ve safely connected to a .gov website. Share sensitive information only on official, secure websites.

Global Positioning

Members of a 1922 geodetic survey expedition.

Members of a 1922 geodetic survey expedition. Until recent advances in satellite technology, namely the creation of the Global Positioning System (GPS), geodetic surveying was a task best suited to individuals with strong constitutions and a sense of adventure.

Geodesy is the science which makes global positioning possible. Geodesy is literally the science of measuring and monitoring the size and shape of the Earth and the location of points on its surface. NOAA's National Geodetic Survey (NGS) is responsible for the development and maintenance of a national geodetic data system that is used for navigation, communication systems, and mapping and charting.

The Global Positioning Tutorial is an overview of the history, essential elements, and modern methods of geodesy.

The Roadmap to Resources complements the information in the tutorial, leading you to additional information and data resources from NOAA and other reliable resources.

 National Science Teachers Association (NSTA)

The National Science Teachers Association (NSTA) includes this online resource in its SciLinks database. SciLinks provide students and teachers access to Web-based, educationally appropriate science content that has been formally evaluated by master teachers. More information about the SciLinks evaluation criteria is available at: http://www.scilinks.org/certificate.asp.

More Information
Roadmap to Resources Subject Review Is the Earth round? (Ocean Facts)
a drawing of a city with text that says location science improves everyday life
Search Our facts
Get Social
Last updated:

Author: NOAA

How to cite this article

Contact Us