ddvo/gpxconv

GPX track converter to post-process tracks as typically produced by GPS loggers

gpxconv's Issues

Adding -swim option

Hi @DDvO,

I hope all is well! Open water swimming season has resumed and I have my first set of bad GPS points from my Apple Watch, so I wanted to follow up on a previous comment of yours:

If you provide me feedback/corrections to the following suggested limit data for swimming:

$MIN_TIMEDIFF          = 1;
$MAX_SENSIBLE_SPEED    = 10;
$MAX_SENSIBLE_ACCEL    = 1;
$MAX_SENSIBLE_ELE_GAIN = 1;
$MAX_SENSIBLE_ELE_LOSS = 1;

I can add the -swim option any time.

$MIN_TIMEDIFF = 1;

I think this makes sense. Most swimmers will be tracking GPS on a watch, so you'd only get a reading when the arm with the watch exits the water. Having said that, you can also just put a GPS device in a swim buoy and it would be able to get readings much more often. Some people tuck a watch under their cap.

$MAX_SENSIBLE_SPEED    = 10;

I just checked some results from a local race that took place today with some very good swimmers. The fastest time for a 1km race came in at 13:26. Based on that, I think $MAX_SENSIBLE_SPEED = 6; should be a sensible default.

$MAX_SENSIBLE_ACCEL    = 1;

I think this is good

$MAX_SENSIBLE_ELE_GAIN = 1;
$MAX_SENSIBLE_ELE_LOSS = 1;

I think those are both reasonable as well. I guess in theory you could be swimming up or downstream, but I think those are not the vast majority of cases.