Garmin eTrex Vista 사용자 설명서

50

The Units features are best used by individuals with 

a working knowledge of map grids and datums. To learn 
more about these subjects, visit the  National Imagery and 
Mapping Agency at http:// www.nima.mil or inquire at 
your library.

 Position Format - Allows you to choose from 

different grid formats. The default position format, 
‘hddd°mm.mmm’ displays the latitude and longitude in 
degrees and minutes and is most commonly used.

 Map Datum - Offers a selection of nearly all map 

datums in common use. Every map is based on a map 
datum (a reference model of the earth’s shape) and is 
usually listed in the title block of the map. If you are 
comparing GPS coordinates to a paper map, chart, or 
other reference, the map datum in this fi eld must match 
the horizontal map datum used to generate the map or 
other reference. The default datum is  WGS 84 (World 
Geodetic Survey 1984) and should only be changed when 
using maps or charts specifying a different datum. If a 
map does specify a datum, use the options list to fi nd 
datums applicable to the region of the map, selecting the 
one that provides the best positioning at a known point. 
If necessary, you also may choose the ‘User’ datum for 
custom designed grids.

  Distance/ Speed - You can choose from three  units of 

measure to display your rate of travel.

  Elevation/ Vertical Speed - You can choose from 

two units of measure to record your elevation and rate of 
ascent.

1.   For all fi elds on this page, highlight the fi eld and 

then press the CLICK STICK to display the Options 
Menu for the fi eld.

2.   Highlight the desired option on the menu and then 

press the CLICK STICK to place it in the fi eld. 

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9/20/2002, 9:54:40 AM