area measuring

a gui which allow measuring an areas size and a paths length on an image (map).

You can calibrate the image scale.

You place points using left mouse button and remove points & areas with right mouse button.

You have three different methods of measuring the area surface:
1. Monte-Carlo.
2. Triangulation (my method which works really cool but isn't optimal).
3. MATLABs way (which works the best).