The longitude and latitude coordinates on Google Map pages are in degrees. Therefore, to convert the latitude and longitude data in NMEA format to the latitude and longitude coordinates on the Google Map webpage, you only need to divide the value with a decimal point and divide it by 60 degrees.
If you connect your laptop to a GPS device while you're traveling, you can see your GPS location in real-time in Google Earth.
Follow steps 1-6 under Import GPS data.
In the "GPS Import" window, click Realtime.
Select the appropriate options: Select protocol: If you're not sure what to use, choose "NMEA." ...
Click Start.
