Salt lake three-dimensional map construction method and system based on laser radar and GNSS

The invention discloses a salt lake three-dimensional map construction method and system based on a laser radar and a GNSS, and relates to the technical field of laser radar mapping and positioning. The method comprises the following steps: after acquiring three-dimensional point cloud data of a salt lake environment and pose data of a hydromining machine by adopting a laser radar, processing the pose data to obtain pose processing data; then, creating a first queue based on the three-dimensional point cloud data, and creating a second queue based on the pose processing data; then, performing data matching on the data in the first queue and the data in the second queue in sequence based on a timestamp to obtain a data matching result, and performing coordinate transformation on position coordinates in the data matching result to obtain transformed point cloud data; finally, a three-dimensional point cloud map of the salt lake environment is obtained based on the transformed point cloud data, dynamic monitorin