Houston topographic maps

Average elevation: 10 m

Average elevation: 19 m

Average elevation: 21 m

Average elevation: 28 m

Average elevation: 26 m

Average elevation: 21 m

Average elevation: 13 m

Average elevation: 12 m

Average elevation: 29 m

Average elevation: 22 m

Average elevation: 31 m

Average elevation: 12 m

Average elevation: 30 m

Average elevation: 15 m

Average elevation: 23 m

Average elevation: 17 m