Three-dimensional model construction method and device for road-canal network containing bridge and culvert nodes

The embodiment of the invention provides a three-dimensional model construction method and device for a road-canal network containing bridge and culvert nodes. The three-dimensional model constructionmethod comprises the following steps: obtaining to-be-modeled road and canal network data, wherein the road-canal network at least comprises a first line and a second line, and the road and canal network data at least comprises a first center line of the first line, a second center line of the second line, a first section corresponding to the first center line, a second section corresponding to the second center line, and a bridge and culvert node between the first center line and the second center line; and constructing a three-dimensional model of the road-canal network according to the road-canal network data. According to the three-dimensional model construction method and device provided by the embodiment of the invention, the bridge and culvert node of each line in the road and canal network, the center lin