Global Positioning System

GPS
Global Positioning System satellites transmit signals to equipment on the ground. When the receiver estimates the distance to at least four GPS satellites, it can calculate its position in three dimensions.

GPS World
Commercial Magazine discussing GPS technologies

Garmin
Manufacturer of Global Positioning System (GPS) technology and electronics.

Magellan
Manufacturer of Global Positioning System (GPS) technology and electronics.

GIS User.com
Taking you beyond the map

GIS Resource List
This is an index of World-Wide Web (WWW) servers which are likely to be of interest to the GIS community.

Trimble
Provides a tutorial on GPS use.

The Aerospace Corporation
Provides a GPS primer.

GPSy
This is a page of links containing information about the Global Positioning System (GPS) and handheld GPS units.