Documents Session 4 Global Positioning System (GPS). Feasibility studies began in the 1960’s. Pentagon...

Slide 1Session 4 Global Positioning System (GPS) Slide 2  Feasibility studies began in the 1960’s.  Pentagon appropriated funding in 1973.  First satellite launched…

Documents Projections. Review The Earth is a complex shape called a geoid Ellipsoids are models that...

Slide 1 Projections Slide 2 Review The Earth is a complex shape called a geoid Ellipsoids are models that approximate the shape of the Earth Ellipsoids are used in place…

Documents Using GPS with Maps. GPS’ Own Internal System GPS Ellipsoid: GRS-80 (Geodetic Reference System...

Slide 1 Using GPS with Maps Slide 2 GPS’ Own Internal System GPS Ellipsoid: GRS-80 (Geodetic Reference System 1980) GPS Datum: WGS-84 (World Geodetic System 1984) (equivalent…