Roadway mapping device

A roadway mapping device for a vehicle includes a camera unit for detecting image data and a control unit. The control unit is configured to determine roadway regions in the image data detected by the camera unit. The control unit is further configured to transform the image data, including the determined roadway regions, into a bird's-eye view by utilizing inverse perspective imaging and to project same onto a plane. The control unit is further configured to add the determined roadway regions to a grid map in the plane. Furthermore, the control unit is configured to align at least two grid maps from two different journeys with respect to each other and to combine them to create a final grid map of the roadway regions.