#!/bin/bash
# usage:
#   nmea2gpx < nmea-log.txt > track.gpx
#
# convert NMEA track to GPX track

if [ $# -ne 0 ]; then
  echo "usage: nmea2gpx < nmea-log.txt > track.gpx"
  exit
fi

grep -e "^\$GPRMC" -e "^\$GPGGA" -e "^\$GPVTG" -e "^\$GPGSA" | \
gpsbabel -t -i nmea -f - -x discard,hdop=10,vdop=20 -o gpx -F -
