Filtering

Doesn't seem to be a reliable way to filter high velocity points.

Take successive derivatives of all points and filter on that?

• Comment out the bogus points in the gpx
• Use gpxplot.py to check for velocity peaks quickly

Segmenting

Splits tracks at long breaks (e.g. lunch).

Split after 30mins:

$ gpsbabel -i gpx -f in.gpx -x track,pack,split=30m -o gpx -F out.gpx

Waypoints

name

short descriptive name

cmt

original GPS name

desc

"Day x: Description"

sym

Garmin waypoint symbols

Symbols

Garmin GPS III+

Flag

miscellaneous

Drinking Water

Water stops, springs, etc

Swimming Area

Lakes

Residence

Overnight

Campground

Overnight

Picnic Area

Lunch stops

Crossing

Railway crossings

Rendering

• GpsVisualizer?
• Google Maps
  • Paste the gpx URL in the google maps search box

Links

• GPS Visualizer
• gpxplot