Eagle Electronics 502cDF manual Map Datum Selection, Map Detail Category Selection

To set Lat/Long Grid: From the Map Page, press MENU↓ to MAP DATAENT. Press ↓ to LAT/LON GRID LINES. With the option highlighted, press ENT to turn it on (check) and turn it off (uncheck). After the op- tion is set, press EXITEXIT to return to the main page display.

Map Datum Selection

Maps and charts are based on a survey of the area that's covered by the map or chart. These surveys are called Datums. Maps that are created using different datums will show the same latitude/longitude in slightly different locations.

All datums are named. The GPS system is based on the WGS-84 da- tum, which covers the entire world. Other datums may also cover the entire world, or just a small portion of it. By default, your position shows using the WGS-84 datum. However, it can show your position using one of 191 different datums. Different datums can be selected; to change the datum:

1.Press MENUMENU↓ to GPS SETUPENT↓ to DATUM SELECTIONENT.

2.Use ↓ ↑ to select the desired datum and press ENT.

3.To return to the last main page display, press EXITEXIT.

A list of the datums used by this unit is in the back of this manual.

GPS Setup Menu (left). Map Datum Menu (right).

Map Detail Category Selection

This menu determines which of the mapping features are shown on the screen. This includes, waypoints, trails, icons, cities, highways, etc. You can selectively turn on or off any of these items, customizing the map to your needs.

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