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. GPS – Global Positioning System What is it?. GPS consists of satellites which continuously orbit the Earth.

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How GPS and GIS are used to Manage Natural Resources

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How GPS and GIS are used to Manage Natural Resources


Given By: Amanda Tydings

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.


  • 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.


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.

The Latitude/Longitude Grid


  • 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.

How to Use a GPS Receiver

  • Marking a waypoint

  • Finding a previously saved waypoint

  • Rate of travel

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


Search and Rescue





Practical Uses for GPS Receivers

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.

Representation of GIS 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.


Land Uses of a Watershed

Integrating GPS and GIS


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