We suggest you to set the track sampling rate of your GPS at 10 seconds or less; this will create a more precise tracklog, allowing T2t to perform its calculations with greater precision. The best tracks for creating waypoint/thermal files are those from competitions and XC flights, that is flights where you used the thermals to make distance; weekend flights where you just boated around in the same thermal, or ridge soaring flights, are pretty useless. Days with clear skies or cloud coverage of 4/8 or less are the best; in these conditions the thermals are more likely to rise from ground trigger points and less from temporary sunny spots. The thermal maps won’t work in desert areas or with a very homogeneous appearance: there, thermals are more likely to start from random points, from what I have heard.

PARAMETERS	DESCRIPTION
pathmain=C:\Programmi\Track2thermic\	You should change this if you install the program in a folder other than the default;
viewprogram=notepad.exe	This is the program that Windows will use to view the files “track2thermic.ini” (parameters file), “xxxx.plt” (source file), “yyyy.wpt” (target file);
generaplt=0	If you set this value to 1 the program will generate, beside the target file “yyyy.wpt”, another file “yyyy.plt” containing only the thermal spots;
gapfeet=33	distance interval for the thermal start point seek process, in feet;
gaptime=20	time interval for the thermal start point seek process, in seconds;
tsame=30	All thermals with intervals less than “tsame”, expressed in seconds, will be joint together as one thermal;
clusterdim=200	Range (in meters) for Utilities command "Find relevant thermal data";
vsmclusterdim=500	Range (in meters) for Utilities command "Centroid-based thermal data classifier";

(adjustable parameters of T2t, for advanced users, contained in “track2thermic.ini” file)