In the near future, car navigation systems will actualize higher level of driving assistance that is close to autonomous driving in order to assure human safety and a sustainable society. Such navigation systems shall require more precise and more detailed road maps than the conventional one. For instance, lane level intersection maps including pedestrian crossings are necessary to avoid collision accidents. Detailed lane marking with curvature and gradient is necessary to perform advanced driving assistance as well. DRM has generated a pilot database of precise intersection maps and lane level highway digital maps by means of photogrammetry with aerial photographs on scale of 1:8000 and mobile vehicle mapping with GPS/IMU positioning and high-resolution digital video cameras.