Display earth curvature in profile function

[tgdbepe4]

I miss in the profile function an option in which I can select the earth curvature (normalle 1.333) and the fresnel zones. This is necessary for longer distance microwave connections. In short: Not all what you calculate from the map is visible in real because the map is plain and the earth is a round. And for microwave connections at minimum the first fresnel zone must be free of objects. E.E. in a 100 km distance a tower must be 700m higer then what you calculate from the map.

[manisandro]

The calculation takes earth curvature in account [1].

[1] https://github.com/kadas-albireo/kadas-albireo2/blob/master/kadas/gui/kadasheightprofiledialog.cpp#L460

[tgdbepe4]

I suggest to add a box like this:

And with a result like this: