07.05.2014, 17:51
I got a few more sample .btk files from the guy who originally sent me one, and I'm happy to say that it looks like I've got it right.
The only potential issue is with the time stamps: It seems that these devices record a point every 2 seconds... so as it stands now, I'm taking the "number" field from each trackpoint, multiplying it by 2, and adding the result to the track's initial time stamp. The question is whether these devices ALWAYS use a 2-second interval; it does seem to be the case (and here's a Bushnell FAQ that sort of confirms it), but if they don't, that'll foul up my calculations.
The only potential issue is with the time stamps: It seems that these devices record a point every 2 seconds... so as it stands now, I'm taking the "number" field from each trackpoint, multiplying it by 2, and adding the result to the track's initial time stamp. The question is whether these devices ALWAYS use a 2-second interval; it does seem to be the case (and here's a Bushnell FAQ that sort of confirms it), but if they don't, that'll foul up my calculations.