A while ago, I've implemented NMEA log support for RouteConverter by using GPSBabel. I've implemented this by converting NMEA to GPX with GPSBabel and parsing GPX. For long tracks with tens of thounds of NMEA sequences, this setup can consume a lot of time and memory.
Reimplementing this with just support for GGA sentences gave a speedup of factor 10, which shows for me that it could be worth it. On the other hand there are a lot of different sentence types.
What do you think? Is GGA and RMC enough?
The latest news about the user friendly GPS tool that allows route conversion, editing, planing
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