How GPS and GIS are used to Manage Natural Resources

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How GPS and GIS are used to Manage Natural
Resources

• Presentation
• Given By Amanda Tydings

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GPS Global Positioning System What is it?

• GPS consists of satellites which continuously
  orbit the Earth.
• There is a network of ground stations used for
  monitoring and control of the satellites.
• GPS provides users with accurate information on
  position, velocity, and time anywhere in the
  world.

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Satellites

• There are 24 satellites that continuously orbit
  the Earth at an altitude of 11,000 miles
• Radio signals are sent from the satellites and
  are picked up by the GPS receivers.
• GPS receivers must lock on to at least 3
  satellite radio signals to properly navigate.

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Satellites
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The Latitude/Longitude Grid

• The Lat/Long grid consists of the same elements.
  The axis are the Equator running in an east/west
  circle around the globe, and the Prime Meridian
  which is a line running north and south through
  Greenwich England.

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The Latitude/Longitude Grid
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Accuracy

• The accuracy of the receivers is dependent on the
  number and quality of the signals from the
  satellites.
• Many factors can affect the accuracy of a GPS
  unit. These factors include proximity to
  buildings, canyons and trees. Even haze can
  prevent you from getting a good satellite signal.
• Accuracy can be off by as much as 300 ft.

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How to Use a GPS Receiver

• Marking a waypoint
• Finding a previously saved waypoint
• Rate of travel

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Practical Uses for GPS Receivers

• One can navigate back to a starting point or
  other predetermined locations with out the use of
  maps or any other equipment

• Navigation
• Search and Rescue
• Hiking
• Hunting
• Camping
• Fishing

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GIS Geographic Information System What is
it?

• GIS stores information about the world as a
  collection of layers and display this information
  as maps.
• GIS technology can be used for scientific
  investigations, resource management, development
  planning and many other applications.

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Representation of GIS Layers
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Layers

• Layers can include stand delineation,
  demographics and census data, transportation,
  populated places, political boundaries, soils,
  surface water and aquifers and many more.
• Geography is the glue that binds these layers
  together.
• GIS is the tool that allows you to see the
  relationship between them.

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Layers
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Land Uses of a Watershed
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Integrating GPS and GIS
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QUESTIONS/COMMENTS