National Geodetic Survey Explorer
Maps & Cartography

NAD83 – We’re Not in Kansas Anymore

North American Datum of 1983 (NAD83) is 2-meters from geocentric and uses thousands of monuments with triangulation to create a reference frame for Earth

Maps & Cartography

World Geodetic System (WGS84)

The World Geodetic System 1984 (WGS84) is the spatial reference system of GPS satellites with an error of less than 2 centimeters to the center of Earth.

Arctic Maps Ocean Floor
Maps & Cartography

5 Maps that Explain the Arctic

Mineral extraction, natural gas as well as potential shipping routes. These Arctic Maps display one of the last great frontiers for human development.