ILS obstacle clearance area

[greek-freak]

Thanks guys, I will try to find exact topological information about LGIR.

But still, is nobody here who knows the definition of the required obstacle clearance area around the ILS centerline? It should logically be either a circle (ellipse) or a rectangle centered at the ILS axis with decreasing surface towards the threshold, i.e. depending on the distance from the rwy end.

Thanks again