Data processing method and device and surveying and mapping method and device

The invention discloses a data processing method and device and a surveying and mapping method and device, and relates to the technical field. The method comprises the following steps: carrying out real-time differential positioning on a plurality of waypoints of an aircraft by using a carrier phase to obtain real-time differential position data corresponding to the plurality of waypoints; under the condition that the data of at least one waypoint in the multiple waypoints is missing, resolving the post differential position data corresponding to the at least one waypoint to obtain resolving position data corresponding to the at least one waypoint, the post differential position data being obtained by performing post differential positioning on the multiple waypoints by using a carrier phase; and fusing the real-time differential position data and the resolving position data to obtain the position information of the aircraft at a plurality of waypoints. According to the method and the device, under the condit