GENERATION DEVICE, GENERATION METHOD, AND GENERATION PROGRAM

A generation device includes processing circuitry configured to receive a plurality of inputs of road map data including longitude/latitude data on lane information indicating a center line of a lane, longitude/latitude data on a road shoulder line, and longitude/latitude data on a lane marker, and refer to the road map data and generate a first polygon indicating a region of a lane based on a plurality of intersections on the lane marker or the road shoulder line crossed by a vertical line from the lane information.