Follow the steps below on to change Datum on the Earthmate application for Android devices.

1. Open Earthmate app.

2. Tap the Settings icon .

3. Tap on Settings.

4. Tap on Units.

5. Tap on Datum.

6. Select a datum option. WGS84 is the default and most commonly used option.

More information on the geodetic datum can be found here: http://en.wikipedia.org/wiki/Geodetic_datum.