Drones are extensively being used nowadays for their accuracy and precision for any mapping, surveying and for surveillance. To get location information the GPS is enabled, and Real Time Kinetic also known as RTK and Post Processing Kinematic also known as PPK are the two emerging developing methods.
RTK is the process of correcting location errors when the drones are flying, while PPK is applying correction after the flight. These are important because a drone without the ability to record accurate information is just a simple flying machine with a camera on it. You can get excellent images and videos, but this can not be used for surveillance, mapping or for surveying purposes. Since Drones are being used for bigger and crucial projects, accuracy, efficiency and time becomes paramount.