Returns the GPS measurement selected from the dropdown menu.
Available options:
- Latitude: Returns the current latitude in decimal degrees.
- Longitude: Returns the current longitude in decimal degrees.
- Altitude: Returns the estimated height above sea level in metres.
- Speed: Returns the current speed in kilometres per hour.
- Satellites: Returns the number of satellites currently locked.
- Course: Returns the heading direction in degrees, from 0° to 360°.





























































