What I need is a Google Earth Add On that can plot on Google Earth Maps the Line-of-Sight of a choosen point.
The user of Google Earth will choose a point either by dragging an icon on the map or entering geo-coordinates.
THe user will specify the height of the point over land surface.
THen the add on will plot around the choosen point all the surrounding line-of-sight points marking them with a color. THe plotting will be semi-transparent and the color can be freely chosen.