Easy application in finding map distance, terrain distance and scale.

The application details as follows:

1. Calculate the field distance with the scale input in the fraction and input the map distance in the desired unit (mm, cm, dm, m, dam, hm and km).
2. Calculate the distance of the map with the scale input in the fraction and the input field distance in the desired unit (mm, cm, dm, m, draft, hm and km).
3. Calculate the scale with the map distance input and the field distance in the desired unit (mm, cm, dm, m, dam, hm and km) as well as the scale / beam output in the fraction.