Is it legal to operate a drone (quadcopter or other type) in autonomous mode over private property (either with owner's permission or over my own property)? By private property I mean private real estate like agricultural fields, woods/forests etc. An example usage case would be operating something like a cargo-drone for agricultural purposes.
I am interested in global legal situation, but EU, USA and China are my main areas of interest.
The contrary to autonomous mode would be manual mode where one usually has to maintain line-of-sight when operating a drone. I also guess there is a maximum height that "hobby" aviators are allowed to reach.
A side question - what is the current legal situation for operating a drone in the states listed above? I know about the "Unmanned Aircraft Systems (UAS) Registration" in the US only.