Building contour three-dimensional modeling monitoring method and system based on point cloud data

The invention provides a building contour three-dimensional modeling monitoring method and system based on point cloud data, and relates to the technical field of point cloud data three-dimensional modeling monitoring, and the method comprises the following steps: carrying out the offset test of an unmanned plane, and obtaining effective point cloud data; based on the effective point cloud data, offsets of the unmanned aerial vehicle at different wind speeds are analyzed; scanning the building to obtain initial point cloud data of the building; the current wind direction and wind speed are monitored in real time, and meanwhile the real-time offset of the unmanned aerial vehicle is analyzed; performing data calibration on the initial point cloud data based on the real-time offset; performing three-dimensional modeling on the building based on the actual point cloud data; the method is used for solving the problems that according to an existing point cloud data three-dimensional modeling monitoring technology,