Sharing Knowledge of GPS

What is GPS?
GPS is a system in order to determine the position by using latitude longitude and height coordinates referring to World Geodetic System (WGS) ’84.

The system consists of: satellites (which are operated by Department of Defense of USA), Control Stations, and Receiver.

What for?
It helps a surveyor for conducting topographic and marine surveys, construction (road, building, drainage, etc), useful for fishermen (navigation purposes), and so forth.

In simple word: to find your position in one global coordinate system.

Is that complicated stuff? No, it is not.
Based on your purpose and your budget you may choose any type of GPS.

For road construction you may choose real time kinematic GPS bundle which is quiet expensive compared to GPS for navigation.

Even some types of your mobile phones now are equipped with the small GPS receiver.

My experiences with GPS’s Devices:
- handheld GPS (for navigation): garmin, geo explorer I – III, magellan
- real time kinematic GPS (for mine survey): Trimble 4000 SSi, Trimble 4700, Trimble 4800, Trimble 5700
- GPS for GIS: Geo Explorer III, Trimble 4600 LS + data logger, ProXL
- And Differential GPS (marine survey): Trimble MS860 + HydroPro