Positioning systems have advanced tremendously over the years. With the removal of selective availability it is now possible to get 3m positional accuracy with the cheapest of receivers, suitable for many GIS applications. GeoVision has experience with a wide range of GPS data collection equipment, including Trimble,Leica,and Garmin.

To understand more about GPS systems the following websites should be of interest - NAVSTAR, GLONASS, GALILEO

For more general GPS Information click here