The mainland portion of Tokyo lies northwest of Tokyo Bay and measures about  east to west and  north to south. The average elevation in Tokyo is . Chiba Prefecture borders it to the east, Yamanashi to the west, Kanagawa to the south, and Saitama to the north. Mainland Tokyo is further subdivided into the special wards (occupying the eastern half) and the Tama area () stretching westwards. Tokyo has a latitude of 35.65 (near the 36th parallel north), which makes it more southern than Rome (41.90), Madrid (40.41) and New York City (40.71).