Rapid Construction Algorithm of 3D Urban Road Network from Raster Maps

Aiming at the problems of the complex modeling, large amount and variety of data in the 3D modeling of viaducts and underpass tunnels in digital city, a novel approach is proposed for the rapid construction of 3D urban road network based on the two-dimensional raster map. Extract the centerlines of roads from the two dimensional raster map of different layers, then the rapid three-dimensional solid modeling of the viaducts and underpass tunnels could be realized through the parametric modeling and texture mapping. The experimental results show that the proposed parametric modeling approach of the urban road network could greatly reduce the modeling time, and improve the design efficiency with better flexibility and interactivity.