Megalith-System Ltd. is the publisher of Award Winning off-road/outdoor navigation software GPS Tuner. GPS Tuner is an excellent tool for hiking, geocaching, boating, flying, driving and many other sporting activities, where the monitoring of duration, distance and speed can be important. If you are in possession of our 'Geo license' with extended features, the Area Calculation function is available to you, which makes it easy to measure perimeter and area.