The purpose NMEA Tools is to log your RAW GPS information to a file on your SD card. Also, it can parse a NMEA file. Features: 1. Log RAW NMEA sentences. 2. Display the route in Google Map. 3. Support background logging. 4. Show latitude, longitude, altitude, speed, PDOP and HDOP. 5. Parse a NMEA file. 6. Support GPS, GLONASS and BeiDou systems.