3D TUNNEL REPRESENTATION

The invention relates to a method for generating a 3-dimensional representation of a tunnel. The method comprises the step of providing road network data (11) including a plurality of road segments, at least one road segment being a tunnel road segment, including the information that said at least one road segment is a road segment located in a tunnel. Furthermore, the method comprises the steps of identifying said tunnel segment in the road network, providing a geographical elevation map (12) including elevation data of the geographical region in which the tunnel road segment is located, providing predefined patterns (13) representing predefined parts of a 3-dimensional tunnel body, generating the 3-dimensional representation of the tunnel based on the tunnel road segment, the elevation map (12) and the predefined patterns (13), and storing the 3-dimensional representation of the tunnel in connection with the road network as a 3-dimensional object which is located at the geographical position of the tunnel road segment.