Garmin eTrex Legend

1
Where In The World? GPS Instruction For
Teachers By Krissy Vaux Mark
McBride Tri-Valley H.S. Downs, IL STARS April 8,
2005
2
About The GPS Satellites

• There are 24 different satellites in space
• They orbit the Earth every 12 hours
  in 6 different planes

http//www.ozebiz.com.au/beacon/etrek.html
3
About The GPS Satellites

• A minimum of 4 satellite signals must be received
  by the GPS unit to determine a 3-D
  position
• GPS units can determine your latitude, longitude
  and altitude

4
About The GPS Satellites

• Most GPS units have an accuracy of using the 24 satellites
• The Garmin eTrex Legend uses the 24 satellites
  AND 25 ground stations to increase the accuracy
  to
• -This is called the WAAS
• system
• (Wide Area Augmentation System)

http//www.garmin.com/aboutGPS/waas.html
5
How Do GPS Units Work?

• GPS units DO NOT transmit satellite signals. They
  passively receive them
• They measure the distance between the GPS unit
  and the satellites

http//tsc.wes.army.mil/gps/dgps.htm
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Garmin eTrex Legend
7
Power and Light Button

• Press and hold the Power Button to turn the unit
  on/off
• Press and release the Power Button and the light
  will come on
• You will see this page appear

8
Page Button

• Press the Page Button several times. You will see
  the display cycle through the main pages that
  look like this

Satellite Page
Map Page
Navigation Page
Trip Computer
Main Menu
At any time you can press the Page Button and
return to one of the Main Pages
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Satellite Page

• Press the Page Button until you see the Satellite
  Page
• The Satellite Page provides a visual
• of the satellites being tracked
• The black circles indicate which
  satellite signals are being received
• The bars at the bottom show
• signal strength
• -Black bars indicate a
• stronger signal than a grey bar
• -4 black bars are required for a proper
• signal

10
Satellite Page

• For the best satellite signal you should
• -Be outdoors
• -Have a clear view of the sky
• -Hold the GPS unit flat and out away from your
  body

11
Satellite Page

• The bottom of the Satellite Page also shows your
  GPS location and elevation (After you have 4
  bars)
• -The N or S line shows Latitude
• -The E or W line shows Longitude

12
Satellite Page

• How many satellites are being used?______
• How many bars of signal strength do you have?____
• What is the GPS location of the Buzzard Hall?
• (The building we were all in)
  _______________
• _______________
• What is the elevation?_______________

13
Map Page

• Press the Page Button 1 time or until you see the
  Map Page
• The Map Page displays your
  movements, waypoints, latitude longitude
• The black arrow shows your location
• Press the Up Down Buttons to zoom
  in and out on the map
• The numbers in the lower left show how much area
  is visible on that map

14
Map Page

• Zoom in until you are at 3 miles.
• What towns are visible? _____________
• __________________________________
• Zoom in until you are at120ft.
• Walk around.
• What happens?_____________________

15
Navigation Page

• Press the Page Button 1 time or until you see
  the Navigation Page
• Walk from Buzzard Hall toward the Green House
  across the street

How fast were you walking?_______________ What
direction were you walking?___________
16
Trip Computer Page

• Press the Page Button 1 time or until you see the
  Trip Computer page
• Move the Click Stick up/down or
  left/right until the single sheet of
  paper in the top right corner is
  highlighted and press strait in
• (Not the picture of several sheets of paper)

17
Trip Computer Page

• A screen will drop down
• Select Reset and press strait in
• Select Apply and press strait in
• Select OK and press strait in
• This resets your Trip Computer

18
Trip Computer Page

• Walk around until the Moving Time reads at least
  2 minutes
• What does the Trip Odometer read?______
• What does the Max Speed read?_________

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Main Menu Page

• Press the Page Button 1 time or until you see the
  Main Menu
• Walk to a point you wish to mark as
  a Waypoint (A Waypoint is a stored
  location in your GPS unit)
• Move the Click Stick up/down
  or left/right until the Mark icon is
  highlighted and press strait in
• The screen will change to the Mark Waypoint Page

20
Mark Waypoint Page

• This page comes up when you press the Click Stick
  strait in on the Mark icon
• You have marked this spot as
  a Waypoint
• A Waypoint is a stored location
  in your GPS unit
• Move the Click Stick up/down or left/right
  until the number in the flag is
  highlighted and press strait in

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Mark Waypoint Page

• When you press the click stick strait in an
  alphabet screen will pop up
• Name your Waypoint by Moving the Click Stick
  up/down or left/right until the correct letter is
  highlighted and press strait in
• Do this until you have completed the name
• When you are finished naming your Waypoint click
  on OK

22
Mark Waypoint Page

• Choose at least 3 other waypoints you would like
  to mark
• Be sure to mark and name them

23
Main Menu Page

• Press the Page button until you are
  back to the Main Menu Page
• Move the Click Stick up/down
  or left/right until the Find icon is
  highlighted and press strait in
• The Find screen will pop up
• Select Waypoint
• Select By Name
• What Waypoints did you list in your GPS?
• ________________________________________

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Main Menu PageReturning To A Waypoint

• To Return to a Waypoint that you have already
  entered in your GPS unit repeat the previous page
  of instructions
• Next use the alphabet page to type the name of
  the Waypoint that you wish to return to
• Press OK when finished
• When your Waypoint is displayed, press Go To
• The Navigation Page will appear directing you to
  the Waypoint that you selected

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Main Menu PageGo To A Known GPS Location

• To go to a GPS location that you have not been to
  before use the Page button to return to the Main
  Menu page
• Select Mark
• Use the Click Stick to highlight the Location box
  and press the Click Stick strait in
• Use the Alphabet page to type in
• N 39____________ W 088___________
• Select OK

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Main Menu PageGo To A Known GPS Location

• Use the Click Stick to highlight the Elevation
  box and press the Click Stick strait in
• Use the Number page to type in ______ft
• Select OK

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Main Menu PageGo To A Known GPS Location

• Use the Click Stick to highlight the Go To box
  and press the Click Stick strait in
• The Navigation Page will pop up and direct you to
  the location
• Which location did that GPS coordinate take you
  to? (Circle the correct picture)

Old Main Booth
Library MLK Student Union
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Map Page continued(Measuring Distance)

• Press the Page button until you are back at the
  Map Page
• Press the up and down buttons on the side of your
  GPS unit to zoom in close enough on your map to
  see all your waypoints

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Map Page Continued(Measuring Distance)

• Move the Click Stick up/down or
  left/right until the single sheet of
  paper in the top right corner is
  highlighted (Not the picture of
  several sheets of paper) and
  press strait in
• A screen will drop down
• Choose Measure Distance

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Map Page Continued(Measuring Distance)

• Use the Click Stick to move the white Reference
  Arrow to one of your Waypoints
• -When a box appears around the name
• of your Waypoint, you know you are
• on the correct spot
• Push the Click Stick strait in to select the
  Waypoint
• (Notice that you can see the name and location
  of your Waypoint and you are 0.0 ft from it)

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Map Page Continued (Measuring Distance)

• Now move the Click Stick to a 2nd Waypoint
• (Remember that you know when you are in the
  correct location if a box forms around the name
  of the Waypoint)
• This time DO NOT press the Click Stick strait in.
• (Notice that you can see the name and location
  of this 2nd Waypoint and its distance and
  direction from the first Waypoint)

32
Math ApplicationArea Calculation

• You can use this feature to calculate Area
• For those of us who dont want to use our
  brains to calculate ANYTHING See the Area
  Calculation Via the Main Menu page

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Area Calculation Via The Main Menu

• If you want to calculate Area WITHOUT math
• Press the Page button to return to the Main Menu
  page
• Move the Click Stick up/down or left/right until
  the Accessories icon is highlighted and press
  strait in
• Choose Area Calculator

34
Area Calculation Via The Main Menu

• It will appear that you have returned to the Map
  Page, but if you notice it is labeled Area
  Calculation page
• Walk to one street corner
• Press the Click Stick strait in to Start
• Walk to the next corner and turn

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Area Calculation Via The Main Menu

• Continue doing so until you make a complete
  circle around the block and end up at the same
  location you began
• Press the Click Stick strait in to Stop
• The area is calculated for you!!!!
• What is the area of the land that block covers?
  _______________

36
Main Menu Page

• Press the Page button to return to the Main Menu
  page
• Move the Click Stick up/down or left/right until
  the Find icon is highlighted and press strait in

37
Main Menu Page

• The Find screen will pop up
• Choose Cities
• Choose By Name
• Type in the name of your favorite city
• How far is it from here? (Distance)________
• What direction?________________

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THE END

• Hold the Power button until the GPS turns off

39
Helpful Hints

• You can move the Click Stick up/down or
  left/right until the picture of several sheets of
  paper in the top right corner is
  highlighted and press strait in
• This allows you to choose which page you want to
  go directly to instead of using the Page Button
  to cycle through all the pages

40
Helpful Hints

• Go to the Satellite page
• Move the Click Stick up/down or left/right until
  the single sheet of paper in the top right corner
  is highlighted and press strait in
• A screen will drop down
• Choose Use With GPS Off
• This will allow you to use the GPS unit without
  getting a signal
• THIS SAVES BATTERIES and works great when you
  practice using the unit without needing a signal
  to get actual locations

41
Helpful Hints

• Check out www.geochaching.com
• Geocaching is a fun way to
  practice using your GPS unit.
• People all over the world have
  left GPS locations for their cache
  in hopes of you finding them!!!
• (I live in a town of 1200 people and there are 8
  caches within 5 miles of my house)
• Type in your zip code to find a cache that
  already exists or you can create your own for
  others to find!!!

42
Contact Us With Any Questions

• Krissy Vaux kvaux_at_tri-valley.k12.il.us
• Mark McBride mmcbride_at_tri-valley.k12.il.us
• There is a link to this power point on our
  webpage
• http//www.tri-valley.k12.il.us/hs/classes/kvaux
• Feel free to use it and manipulate it
• for your own classroom use.