In France legal constraints exist which limit the surface and height of any building in the environment of an airport to guarantee airplane evolution safety in the area – and the possibility of compliance with its long term master plan.
These constraints consist for respecting obstacle limitation surfaces specially designed for a specific airport and its environment.
The French civil aviation technical center designs the obstacle limitation surfaces related to national major airports, and to military airfields.
In addition, it is a reference organization for other state administrations dealing with the obstacle limitation surfaces of non-major national sites.
The on-line document introduces the aims of the surfaces and general information about the way to design them.