1. A method for creating geometry for a driver assistance application, comprising: creating link chains from a plurality of segments that represent a portion of a road network; creating 2D B-splines from the link chains; creating 3D B-splines from the link chains, the 2D splines, and height data; and storing data representing the 2D B-splines and the 3D B-splines in a database, wherein at least one driver assistance application uses road geometry information generated from the stored 2D B-spline and the 3D B-spline data.