Three-dimensional lane model generation method and system

The invention relates to the technical field of three-dimensional road modeling, in particular to a three-dimensional lane model generation method and system, and the method comprises the steps: firstly enabling a lane layer to be converted into a projection coordinate system from a longitude and latitude coordinate system; generating a center line and an edge line of the lane under the projectioncoordinate system; dividing the lane into a plurality of continuous triangular patches, and constructing a two-dimensional coordinate of each triangular patch; constructing a three-dimensional coordinate of each triangular patch by taking DEM data of a lane as a height value of each triangular patch; sequentially connecting the triangular patches to obtain a three-dimensional lane model. According to the invention, the existing two-dimensional electronic map data can be fully utilized, and the three-dimensional model of the lane is automatically constructed, so that a large amount of acquisition work is saved, and th