GIS-31: GPS APPLICATIONS TO NATURAL RESOURCE MANAGEMENT

Order No:

GIS-31

Total Length:

80 minutes



An Introduction to Global Positioning Systems

Reference No:

GIS 31-1

This presentation introduces the fundamental principles of GPS - how the technique of satellite ranging is used to determine the distance to 3 or more satellites, allowing the computation of a position by the GPS receiver. GPS, when fully deployed, will use 24 NAVSTAR satellites in a constellation arranged to provide 24-hour coverage, with 3-dimension position fixes accurate to better than 25 meters. In differential mode, the accuracy will be better than 5 meters, and for surveying applications, the errors will be in the millimeter range.

Lecturer:

  • Steve Briggs, Trimble Navigation Ltd.

Suitability for
Level of
Instruction:

  • University (Undergraduate)
  • Advanced Research
  • Professional

Duration:

26 minutes

Year of
Presentation:

1992

Suggested
Presentations:

GIS-39, GIS-46 GIS-51

 

Datums - Their Use and Abuse

Reference No:

GIS 31-2

Building a GIS typically involves obtaining coordinates from a variety of sources, performing spatial calculations, the results of which may not be meaningful if the coordinates are not referenced to the same system. To understand how coordinates from different sources relate to each other, it is important to know the datum on which they were collected and how different datums relate to each other.

Lecturer:

  • Tim Petersen, Trimble Navigation Ltd.

Suitability for
Level of
Instruction:

  • University (Undergraduate)
  • Advanced Research
  • Professional

Duration:

24 minutes

Year of
Presentation:

1992

 

Applications of GPS

Reference No:

GIS 31-3

The NAVSTAR GPS provides accurate position data which can be used to aid the users of satellite imagery and other remote sensed data in a number of ways. These include geo-referencing satellite imagery and then using the GPS receiver to navigate to a site for ground truthing the satellite image, field data collection by directly digitizing the coordinates at the point of interest, including roads and trails at normal driving speeds. A case study is presented, showing how this was done in the Sierra Nevada mountains.

Lecturer:

  • Arthur F. Lange, Trimble Navigation Ltd

Suitability for
Level of
Instruction:

  • University (Undergraduate)
  • Advanced Research
  • Professional

Duration:

32 minutes

Year of
Presentation:

1992

 

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