Introduction to Global Positioning System GPS Workshop sponsors
Introduction to Global Positioning System (GPS) Workshop sponsors: Boulder Lake Environmental Learning Center Minnesota Logger Education Program University of Minnesota Extension Service
Introductions John Geissler Boulder Lake Environmental Learning Center Tom Hollenhorst Natural Resources Research Institute Ben Mattila University of Minnesota Duluth Participants (name, employer, where you live, experience)
Housekeeping Restrooms Breaks & Refreshments Lunch
Workshop Objectives • Overview GPS basics – What it is, how it works and a history • Is a GPS going to be helpful • Identify key purchase considerations
Workshop Format and Resources Indoor/outdoor format Active participation through exercises and Questions Attendance and evaluation Adjourn by 4: 15 PM Available resources (www. MLEP. org)
What Will GPS Do For You? • Get you to a prospective sale • Help you determine the acreage • Help you map out the access to a sale • Help you get back to the hot fishing spots • Help you on the golf course
What Will GPS Do For You? Answers the age old questions, “Are we there yet? ” “How much longer? ”
Garmin GPSMap 76 Basic Components Courtesy of Garmin International, Inc
Garmin GPSMap 76 Optional Items Obtained • Carrying case • External power source • Owner’s manual
Basic GPS Tasks • Determine your current position - Shows the location on an electronic map Provides you a coordinate you can look up • Remember a place • Determine area • Leading you to a destination • Record routes or paths
Intermediate GPS • Determine waypoints from a map • Transfer data from a computer – Software upgrades – Waypoints, tracks, and routes – Maps • Transfer data to a computer – Waypoints, tracks, and routes – Create maps
What GPS Won’t Do Will not work under water Will not work underground May not work indoors
History of GPS • 1960 – GPS was conceived • 1978 – Department of Defense launched the first satellite • Early 1980 s – GPS system made available for civilian use by Executive Order • 1992 – GPS was used as a navigational unit in Desert Storm • 2003 – WAAS became available
The Three Segments of GPS
NAVSTAR US Satellite System 24 satellite constellation system Space segment Courtesy of Garmin International, Inc
GPS Satellite Control segment
You – the user User segment
Garmin GPSMap 76 2 AA batteries 16 hours battery life Calculates area Stores 1, 000 waypoints WAAS capable for increased accuracy Courtesy of Garmin International, Inc
Garmin GPSMap 76 Grayscale display Weighs 7. 6 ounces Operates down to 5° Fahrenheit Courtesy of Garmin International, Inc
Garmin GPSMap 76 Courtesy of Garmin International, Inc.
Garmin GPSMap 76 Courtesy of Garmin International, Inc
Exercise One The purpose of this exercise is to become familiar with turning on the unit and with the screen displays GRAB YOUR EXERCISE ONE WORKSHEET AND LET’S HEAD OUTSIDE Satellite View Highway View Map View Compass View
Exercise One Let’s review what we did Satellite View Data fields Receiver status Satellite bars Relative satellite location Center = overhead Inner circle = 45 degree to horizon Outer circle = horizon Black number = normal communication Non-black number = no communication Number below bar = satellite number Satellite Signal Strength Bars Clear = initial comm Link established Gray = preliminary location data Black = normal communications Bar Height = indicates signal strength D = indicates differential (WAAS) established Date Time LAT Location LON
Exercise One Let’s review what we did Satellite View How to interpret the Sky plot
Exercise One Let’s review what we did Map Page Data fields (modifiable) Road Waypoint Your current location Contour Scale
Exercise One Let’s review what we did Compass View Data fields (modifiable) Waypoint Gray bar = Direction you are traveling Pointer = Direction you should be traveling
Exercise One Let’s review what we did Highway Page Data fields (modifiable) Current waypoint being navigated to Available waypoint Course Accuracy Scale
Exercise One Let’s review what we did GOTO Information Name Other information Waypoint Distance to waypoint Total distance
Exercise Two Map a Boundary to Determine Area GRAB YOUR EXERCISE TWO WORKSHEET AND LET’S HEAD OUTSIDE During this exercise you will navigate the boundary of an area. Once the track is closed, you will be able to calculate an approximate area.
Exercise Two Let’s review what we did
Exercise Two Let’s review what we did Clear the track log & walk the perimeter Determining an area is easy. Save the Track Log and the unit will display the perimeter length and area.
Introduction to Global Positioning System (GPS) Workshop sponsors: Minnesota Logger Education Program St Louis County Land Department University of Minnesota Extension Service Special thanks to Jeff Dodge Wisconsin Indianhead Technical College (WITC)
Exercise Three Navigating The purpose of this exercise is to help you understand how to use the GPS unit to find a point designated on a sale map or possibly a corner. You will be navigating to several pre-loaded <NAV> destinations using the compass or map screen displays. Each location is marked by a colored sticker, letting you know you successfully located the destination.
Exercise Three Basic Information GPS Provides • Position – The X, Y, and Z coordinates which indicate where the receiver is located. • Course, Bearing & Direction - The compass direction from a position to a destination. • Heading – The direction you are moving. • Distance – The length between two waypoints or from your current position to your destination. • Speed – How fast you are going at that very moment.
Exercise Three Navigating What your GPS screen is telling you about the real world
Exercise Three Navigating Important Terms GRAB YOUR EXERCISE THREE WORKSHEET AND LET’S HEAD OUTSIDE § Location – The actual physical place where you are or the place you are trying to get to § Position Fix – Where the GPS unit says you are § Waypoint/Landmark – Locations worth locating and storing in your GPS unit Locations that you may want to return to (fishing hole) or avoid (cultural resource) § Coordinate Systems – Such as latitude/longitude, represent your position on the earth to a flat surface like a sale map
Exercise Three Let’s review what we did Pointer = Direction you should be traveling Gray bar = Direction you are traveling (Garmin-Pointer Page)
Exercise Three Let’s review what we did Map Page Zoom
Exercise Three Let’s review what we did Modifiable Information Box Modifiable Information Box Waypoint Name Course you are actually walking Your Destination Course you should be walking Your Position View Magnification (Garmin-Highway Page)
Exercise Four Entering Coordinates Latitude and Longitude coordinates
Exercise Four Entering Coordinates Press and hold the Enter key to mark a waypoint. When the screen below is shown, you are ready to make your edits.
Exercise Four Entering Coordinates
Exercise Four Entering Coordinates
Exercise Four Entering Coordinates New coordinates to enter Permit number X 2825 N 48 o 05’ 34. 0” W 093 o 37’ 59. 0” Where is this timber sale located?
GPS Accuracy Operator Error • Transposing numbers when entering in coordinates. • Error in measuring coordinates on a map. • Using the wrong coordinate system.
GPS Accuracy Things You Can’t Control • Satellite clock and • • location Multipath caused by foliage Relationship of satellites to each other in the sky Equipment and background noise Atmosphere
GPS Accuracy Things You Can Control • Multipath caused by vehicles and buildings • WAAS capable receiver • Time of use
How Accurate is Accurate Enough? • GPS without differential correction is at least as good as compass and pacing for locating points and area calculations. • GPS with differential correction will always be more accurate than GPS without that correction. • How close is close enough depends on the application.
• Uses Purchase Considerations • Size and weight • Battery life • Antenna configuration
Purchase Considerations • Memory • WAAS enabled • Mapping • Price
GPS Units
Optional Accessories • Color screen • Remote antenna • Carrying case • External power source • Mounts • Software
Questions?
Evaluations - Conclusion • Evaluation • Workshop attendance confirmation form • Thank You! John Geissler Naturalist Boulder Lake Environmental Learning Center 7328 Boulder Dam Road Duluth, MN 55803 218 -721 -3731
- Slides: 54