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What is Geodesy Anyway? Infographic Series

This infographic series covers geodesy basics and applications.

#### What is Geodesy Anyway? #1

Geodesy is the science of measuring and monitoring the size and shape of the Earth. [221 KB jpg]

#### What is Geodesy Anyway? #2

Building roads and bridges, conducting land surveys, and making maps are some of the important activities that depend on a spatial reference system. [201 KB jpg]

#### What is Geodesy Anyway? #3

The spatial reference frame helps the transportation industry ensure safety and reliability, while reducing costs. [355 KB jpg]

#### What is Geodesy Anyway? #4

Geologists, oceanographers, meteorologists, and even paleontologists use geodesy to understand physical processes on, above, and within the Earth. [287 KB jpg]

#### What is Geodesy Anyway? #5

Throughout history, the shape of the Earth has been debated by scientists and philosophers. [241 KB jpg]

#### What is Geodesy Anyway? #6

At the end of the 16th century, the Royal Society in London and the L'Academie Royale des Sciences in Paris were locked in a battle to determine the shape of the Earth. [233 KB jpg]

#### What is Geodesy Anyway? #7

To measure the Earth, geodesists use a theoretical mathematical surface called the ellipsoid. [276 KB jpg]

#### What is Geodesy Anyway? #8

To account for the reality of the Earth's surface, the geoid, a shape that refers to global mean sea level, was created. [311 KB jpg]

#### What is Geodesy Anyway? #9

Datums (sets of data) are the basis for all geodetic survey work. [289 KB jpg]

#### What is Geodesy Anyway? #10

One application of the horizontal datum is monitoring the movement of the Earth's crust. [286 KB jpg]

#### What is Geodesy Anyway? #11

A powerful tool that has evolved along with GPS technology is the Geographic Information System (GIS). [244 KB jpg]

#### What is Geodesy Anyway? #12

GPS is a constellation of satellites that orbit approximately 11,000 miles above the Earth and transmit radio wave signals to receivers across the planet. [251 KB jpg]

#### What is Geodesy Anyway? #13

To determine your exact position on the Earth, you need to simultaneously access the signals from four satellites. [212 KB jpg]

#### What is Geodesy Anyway? #14

As advanced as GPS technology is, most commercially available GPS receivers are only accurate within several meters. [239 KB jpg]

#### What is Geodesy Anyway? #15

CORS (Continuously Operating Reference Stations) is a network of hundreds of stationary, permanently operating GPS receivers throughout the United States. [250 KB jpg]

#### What is Geodesy Anyway? #16

In 2013, several basins in Colorado, Wyoming, and New Mexico were at less than 50 percent their normal snowpack. [299 KB jpg]

#### What is Geodesy Anyway? #17

Coronal mass ejections are giant bursts of highly energetic plasma that are driven off the surface of the Sun. [336 KB jpg]

#### What is Geodesy Anyway? #18

The Yellowstone Plateau Volcanic Field is known for its beauty and its hazards. [221 KB jpg]

#### What is Geodesy Anyway? #19

The Toutle River was altered by the 1980 eruption of Mount St. Helens and subsequent flows of ash and other debris. [277 KB jpg]