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Introduction to GPS Training Workshop

Learn about coordinate systems, datums, and how GPS units work in this training workshop. Discover how to use GPS for navigation, mapping, and Geographic Information Systems (GIS). Contact us for more information.

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Introduction to GPS Training Workshop

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  1. Citizen Science Training Workshop Lesson 2: Introduction to GPS Your Name – Your Title Natural Resource Ecology Laboratory Colorado State University The Training Workshop Title 2007 Annual Meeting Location, CO May 30, 2007

  2. N S

  3. Coordinate Systems • Geographic (Latitude/Longitude) • Prime Meridian = 0o Longitude • Equator = 0o Latitude • Universal Tranverse Mercator (UTM) • 60 Zones, 6o wide • 20 Sections, 8o tall

  4. Geographic Coordinate System Latitude = 32 7’ 11.3” N Longitude = 110 55’ 48.5” W Prime Meridian Equator

  5. Universal Tranverse Mercator

  6. Example: Universal Tranverse Mercator Where does your state lie?

  7. Example: Universal Tranverse Mercator Where does the point lie? Answer: 4,696,750 meters north (Northing) 471,800 meters east (Easting)

  8. Datums • Earth not a perfect sphere! • Datum defines spheroid used • Common examples • North American Datum of 1927 (NAD27) • North American Datum of 1983 (NAD83) • World Geodetic System of 1984 (WGS84)

  9. Datums • Local Referencing Datum

  10. Datums • Global Referencing Datum

  11. Definitions • Global Positioning System (GPS) • hand-held receiver • determines position (geographic, UTM)

  12. How does GPS work? • Utilizes a network of 24 satellites that transmit precise microwave signals • enables a GPS receiver to determine its location, speed and direction

  13. How do GPS units work? Satellite 1 Location Receiver Location Every point on circle is a possible receiver location Receiver Location?

  14. How do GPS units work? Satellite 2 Location Satellite 1 Location ? ?

  15. How do GPS units work? Satellite 2 Location Satellite 1 Location Known Receiver Location Satellite 3 Location

  16. GPS Data Uses • Navigation • Where am I? • How do I get from point x to point y? • Mapping • Define a point (e.g., campground, plot location) • Define a line (e.g., hiking trail, river) • Define a polygon (e.g., lake, area covered by weed) Line Polygon Point

  17. Geographic Information Systems (GIS) • Definition • information systems that manage, manipulate, and analyze spatial data

  18. Congratulations! You have completed Lesson 2. For more information contact: August 9, 2007 Your Name Contact Information

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