GPS/CORS
GPS refers to the global positioning system which uses satellites to pinpoint where a location is on the globe. This information can be used to tie into the CORS network.
CORS is the Continuously Operating Reference Station. The National Geodetic Survey (NGS), an office of NOAA’s National Ocean Service, manages a network of Continuously Operating
Reference Stations (CORS) that provide Global Navigation Satellite System (GNSS) data consisting of carrier phase and code range measurements in support of three dimensional positioning, meteorology, space weather, and geophysical applications throughout the United States, its territories, and a few foreign countries.
Surveyors, GIS users, engineers, scientists, and the public at large that collect GPS data can use CORS data to improve the precision of their positions. CORS enhanced post-processed coordinates approach a few centimeters relative to the National Spatial Reference System, both horizontally and vertically.
We use these systems when necessary to provide the most accurate data possible.