MLN Survey Protocol
2
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Notes on basic GPS use and functions
What can you use a GPS for?
•
Measuring location (latitude, longitude – elevation is also included) – this is termed
Waypoints
and is the most important function
Can I use my GPS anywhere?
•
GPS units can work anywhere in the world, in any weather, 24 hours a day
•
The basic units described here will give up to about 4-5 meters horizontal accuracy
and 15-20 meters vertical accuracy
•
GPS units will
not
work inside buildings
•
If you use a GPS next tall buildings or in dense forest, you may get problems in
receiving the signal
Moving to a new location hundreds of kilometers away will usually result in an
initial delay in getting a fix on satellite signals. A few minutes wait may be required
in new locations.
What is the best way to use a GPS?
•
Make sure the unit has two AA batteries installed – Alkaline are best
•
Always write down location coordinates, elevation– even if you plan to download
data
•
Always use a GPS to record location data!
Is there anything else I should remember?
•
Do not block the antenna (located just above the word “Etrex” on the front of Garmin
GPS) with your fingers or head
•
Always carry an extra set of two AA Alkaline batteries
