Map Datums - Garmin 101 Owner's Manual

Main Menu Pages
Setup Menu: Set Units
Set Units Page
Selecting the Map Datum
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Map Datums

A map datum is a reference model of the earth' s shape. Every map uses a map datum
which is usually listed in the title block of the map. The default datum in the Foretrex 101
is WGS 84 (World Geodetic Survey, 1984). You should only change the datum if you are
using maps or charts that specify a different datum. Choose the 'USER' datum if using a
map with custom-designed grids.
NOTE:
The 'USER' datum is based on a WGS-84-Local datum and is an advanced
feature for unlisted or custom datums. To learn more, check your local library or
the Internet for educational materials on datums and coordinate systems.
To change the Map Datum:
1. Press the PAGE button until the Main Menu Page is displayed. Use the
buttons to highlight 'SETUP' and press
2. Use the and
UP DOWN
3. Press the UP or DOWN
ENTER button.
4. Press the UP or DOWN
button.
5. Press the PAGE button to return to the Main Menu Page.
ENTER .
buttons to highlight 'SET UNITS' and press
button to highlight the 'MAP DATUM' field and press the
button to highlight the desired datum and press the
UP and DOWN
ENTER.
ENTER