Got a few GPS tracks this weekend. Some of them came as .trc or .ftn file (probably from a VDO GP7 device). Turns out that format is reasonably well documented. So I wrote a patch and submitted it to the gpsbabel project.
Here is a first prototype of a MyNav to GPX converter, which works as well:
#!/usr/bin/env ruby
puts '<?xml version="1.0" encoding="UTF-8"?>'
puts '<gpx version="1.0" creator="TRC converter"
xmlns="http://www.topografix.com/GPX/1/0">'
puts '<trk>'
puts '<trkseg>'
STDIN.each do | line |
type, longitude, latitude, direction, speed, altitude, timestamp, rest = line.split('|')
if type == '1' && longitude != '0' && latitude != '0'
time = Time.at(timestamp.to_i).strftime("%Y-%m-%dT%H:%M:%SZ")
lat = latitude.to_i / 3600000.0
lon = longitude.to_i / 3600000.0
puts "<trkpt lat=\"#{lat}\" lon=\"#{lon}\">"
puts "<ele>#{altitude}</ele>"
puts "<time>#{time}</time>"
puts '</trkpt>'
end
end
puts '</trkseg>'
puts '</trk>'
puts '</gpx>'Update (2014-12-17): The patch is in gpsbabel-trunk now.