Eagle Electronics 642c iGPS - Manual (Page 81)

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Map menu (left). Map Data menu (right).
From the Map Page, you can access the Map Data menu by pressing
MENU |
↓ to
M
AP
D
ATA
| ENT .
Earth Map Detail
From the Map Data menu, highlight E ARTH M AP D ETAIL
and press ENT .
Select the desired level of map detail from four options: Off, Low, Me-
dium or High. After the option is set, press
EXIT .
Pop-up Map Information
From the Map Data menu, highlight P OPUP M AP I NFORMATION
and press
ENT to turn it on (check) or turn it off (uncheck). After the option is set,
press EXIT .
Draw Map Boundaries
From the Map Data menu, highlight D RAW M AP B OUNDARIES
and press ENT
to turn it on (check) or turn it off (uncheck). After the option is set,
press
EXIT .
Fill Water With White
From the Map Data menu, highlight F ILL W ATER W ITH W HITE
and press
ENT to turn it on (check) or turn it off (uncheck). After the option is set,
press EXIT .
Map Overlays (Range Rings; Lat/Long Grid)
The map screen can be customized with four range rings and/or grids
that divide the map into equal segments of latitude and longitude.
Range rings are handy for visually estimating distances on the map. The
ring diameters are based on the current zoom range. At a 100-mile zoom,
the screen will show two rings with your current position in the center.
The large ring touching the left and right sides of the screen is 100 miles