Hi, Last week, and tuesday I did a cycle circuit race, previously (couple of months ago the tracklog has been pretty flawless, but both the last two times it was interestingly and consistently wrong on every lap, the same errors also happened on my girlfriends Garmin. The logs were both recorded on a Garmin 705, you can get a gzipped version of the tcx file here http://jibbering.com/2009/04/screwy.tcx.gz (or screwy.gpx.gz for a gpx version of it) I also uploaded it to http://connect.garmin.com/activity/3973718 From which you can see that the Garmin recorded the distance log right (as the speed graphs are pretty much correct) but the GPS positions were all way off.
What happened was essentially that in a number of areas on every lap, the log went crazy, and instead of following where I went, it went in a weird straight line off course. In the map view of it http://jibbering.com/2009/04/screwy.jpg or on the satellite view on the garmin page you can see the circuit clearly, and previously the logs have been accurately following it, but in both the last two weeks races it was just in a couple of parts of the course where it was on course, the other times being peculiarly off course, with weird straight lines - not just the ones where it suddenly jumped. Anyone have any insight into why this might've happened? Particularly to two seperate devices. Also if anyone can think of a relatively simple way to "fix" the log - to a reasonable approximation I would be happy. Cheers, Jim. _______________________________________________ Geowanking mailing list [email protected] http://geowanking.org/mailman/listinfo/geowanking_geowanking.org
