Urban digital map three-dimensional modeling manufacturing method

The invention discloses an urban digital map three-dimensional modeling manufacturing method which comprises the following steps: encoding and identifying map blocks divided from a target map; acquiring aerial images and ground shot images of the map blocks; shooting and scanning the target map by using a LiDAR system, so as to acquire LiDAR laser point cloud and LiDAR image data; splicing the aerial images so as to generate a whole image of the target map; performing vectorization processing on the whole image so as to obtain an earth surface vectorization topographic map layer of the target map; manufacturing a coordinate system map layer and an earth surface elevation map layer reflecting the earth surface height by using LiDAR laser point cloud data; respectively manufacturing map layers of roads, small items, forests, ground building elevation and ground building texture according to the ground images, and finally fusing the map layers on a map publication platform so as to establish a three-dimensional digital map of the target map. The urban map manufactured by using the method comprises urban ground elevation, ground building texture, urban road surface texture, road materials, small urban items and urban gardening, and a user can conveniently check and use the urban map.