GPS nmea GPX (or KLM) converter for Google Maps

This script take large amount of GPS data in nmea format and convert into gpx format to import into Google maps.

I had large amount of data coming from a trip to Iceland and I wanted quicly import it on Google My Maps.

Google has a limit of 5 MB but my data was 90 MB.

To reduce the data the script

• only export latitude and longitude
• approximae the latitude and longitude values reducing the number of decimal digit
• skeep points

There are two variables that you can adjust to get an putput file smaller than 5 MB. In my case the best compromise was

• savePointsEvery = 4
• precision = 6

This generate an ouput file of 4,5 MB

Using instead

• savePointsEvery = 4
• precision = 6

The output file was 6 MB

The output files are in the folder data.

Source

Find the source at https://github.com/lucamug/gps-converter

Example

This is the result after imported in Google Maps:

Source

Others

Online converter:

http://www.gpsvisualizer.com/convert_input