http://www.tmgenerator.com/home

http://ozreport.com/forum/viewtopic.php?p=109448#109448

TMG is new program produced in Poland, used to generate a map of
thermals for Garmin GPSes, eg. Oregon, 62, etc. The Garmin GPS supports multiple
maps at the same time. The program analyzes IGC files and creates a map as an
overlay on a standard map and shows where we can expect lift

Here you can see screenshot of the map:

https://picasaweb.google.com/goskkawa/MapyTermiki?authkey=Gv1sRgCO_SufTtqYPvpAE