Transcript Garmin eTrex Legend

Where In The World?
GPS Instruction For Teachers
By: Krissy Vaux & Mark McBride
Tri-Valley H.S.
Downs, IL
STARS April 8, 2005
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
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
About The GPS Satellites
• Most GPS units have an
accuracy of <15 meters using
the 24 satellites
• The Garmin eTrex Legend uses
the 24 satellites AND 25 ground
stations to increase the accuracy
to <3 meters
-This is called the WAAS
system
(Wide Area Augmentation System)
http://www.garmin.com/aboutGPS/waas.html
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
Garmin eTrex Legend
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
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
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
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
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
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?_______________
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
Map Page
• Zoom in until you are at 3 miles.
• What towns are visible? _____________
__________________________________
• Zoom in until you are at120ft.
• Walk around.
• What happens?_____________________
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?___________
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)
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
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?_________
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
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
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
Mark Waypoint Page
• Choose at least 3
other waypoints you
would like to mark
• Be sure to mark and
name them
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?
________________________________________
Main Menu Page:
Returning 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
Main Menu Page:
Go 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
Main Menu Page:
Go 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
Main Menu Page:
Go 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
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
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
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)
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)
Math Application:
Area Calculation
• You can use this feature
to calculate Area
**For those of us who don’t
want to use our brains to
calculate ANYTHING…
See the Area Calculation
Via the Main Menu
page**
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
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
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? _______________
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
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?________________
THE END
• Hold the Power button until the GPS turns
off
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
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
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!!!
Contact Us With Any
Questions…
Krissy Vaux [email protected]
Mark McBride [email protected]
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.