Rapid surveying and mapping method and surveying and mapping system for engineering based on unmanned aerial vehicle photographing

The invention discloses a rapid surveying and mapping method and system for engineering based on unmanned aerial vehicle photographing. The surveying and mapping method comprises the following steps: acquiring an aerial picture of a surveying and mapping area through the camera equipment, wherein the aerial picture contains grid coordinates generated by the grid filter; collecting flight height data of a surveying and mapping area through the laser range finder; obtaining projection distance data between target surveying and mapping points of the surveying and mapping area according to the flight height data under the reference of the grid coordinates through the processing end; and through the processing end, according to the projection distance data, obtaining a target surveying and mapping model, and after a laser range finder is carried, realizing collection of required data. After data are collected, distance data between points are obtained through simple calculation, a surveying and mapping model can b