Spring 2008
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Things of Interest
Student Projects
Intro GIS Spring 07 student projects are now available for viewing. more info...
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*NEW* The Global GIS viewer has been updated with new layers and imagery. Check out the changes.
Global Positioning System (GPS)
The Spatial Analysis Lab houses a variety of GPS receivers that are available for checkout to the SLU community. The Lab also has a computer with GPS Pathfinder Office software for communicating with the receivers and planning your data collection. Personal and classroom instruction in the use of the receivers is available by contacting the GPS Technicians or Carol Cady.
Available Receivers
Trimble GeoXM
Our most versatile unit, the GeoXM is capable of 2 - 5 meter accuracy after post processing and has a complete Windows CE computer system for attribute data entry in the field and mobile GIS. The unit has enough memory to store large image and vector files for field navigation and visualization.
Detailed Description
Trimble GeoExplorer3
A small but powerful unit, the Geo3 is capable of 3 - 5 meter accuracy after post processing. An older unit, the Geo3 is still valuable for carrier phase data collection and its rugged design.
Detailed Description
Trimble Pathfinder Pro XR with TSC1 Data Logger
A more robust unit, the Pathfinder Pro is capable of sub-meter accuracy with real-time differential correction. Experience with the Geo3 or GeoXM is required before checking out the Pathfinder Pro.
Detailed Description
GPS units are available for checkout Monday thru Friday 8:30-4:30 daily. Units are generally checked out in 4 hour blocks of time. If you are planning to use multiple receivers for class use, please make arrangements with Carol Cady or the GPS Technicians.
Resources
Trimble has an excellent online GPS tutorial that goes over the basics.
Also check out NASA's J-Track 3-D Application for realtime locations of orbiting satellites.
Download current ephemeris information here.
Other GPS data resources.
To reserve a unit please fill out the following form: