Airline planning method and device and surveying and mapping method and device

The invention provides a route planning method and device and a surveying and mapping method and device, relates to the technical field of flight control, and solves the problem of non-uniform ground sampling distance. The route planning method provided by the invention comprises the following steps: firstly, acquiring boundary information and elevation information of a target operation area; determining a plurality of working planes corresponding to the target working area based on the boundary information and the elevation information; and then, respectively planning air routes of the flight operation equipment on the plurality of operation planes, so that the flight operation equipment operates in the target operation area based on the air routes corresponding to the plurality of operation planes. A target operation area with a large height difference is divided into a plurality of operation planes, the plurality of operation planes respectively correspond to corresponding routes, and each operation plane