Three-dimensional laser scanning-based engineering geological mapping method

The invention relates to a geological mapping technology, discloses a three-dimensional laser scanning-based engineering geological mapping method, and solves the defects of low efficiency, low precision and large later workload in a measurement scheme of a geological spatial location in the traditional geological mapping process. The method comprises the following steps: a, obtaining point cloud data and geological object image information in a three-dimensional laser scanning manner; b, inputting the point cloud data and the geological object image information into a computer, building a three-dimensional geological model containing the image information; c, describing the geological feature points, geological feature lines and geological feature surfaces according to the geological characteristics on the three-dimensional geological model, and calculating geological attributes; d, inputting the obtained geological feature points, geological feature lines, geological feature surfaces and geological attributes into a management database; e, finishing geological information inputting and inquiring and geological map generation functions according to the data in the management database. The three-dimensional laser scanning-based engineering geological mapping method is applicable to mapping of an engineering geological body.