Flight control for flight-restricted regions

An unmanned aerial vehicle (UAV) comprising:

• a propulsion system;
• a processor;
• and
• a memory storing instructions that, when executed by the processor, cause the processor to:
• determine whether the UAV is within a first flight restriction zone or a second flight restriction zone;
• and
• effect a restriction on the UAV in accordance with a result of the determination, including:
• prohibiting the UAV from flying in response to determining that the UAV is within the first flight restriction zone;
• or
• controlling the UAV to fly below a flight ceiling in response to determining that the UAV is within the second flight restriction zone.