Alton topographic map

Average elevation: 59 m

Average elevation: 67 m

Average elevation: 30 m

Average elevation: 34 m

Average elevation: 51 m

Average elevation: 31 m

Average elevation: 23 m

Average elevation: 23 m

Average elevation: 38 m

Average elevation: 33 m

Average elevation: 33 m

Average elevation: 53 m

Average elevation: 39 m

Average elevation: 44 m

Average elevation: 29 m

Average elevation: 33 m

Average elevation: 51 m

Average elevation: 33 m

Average elevation: 34 m

Average elevation: 41 m

Average elevation: 36 m

Average elevation: 21 m

Average elevation: 23 m

Average elevation: 48 m

Average elevation: 34 m

Average elevation: 39 m

Average elevation: 23 m

Average elevation: 27 m

Average elevation: 34 m

Average elevation: 32 m

Average elevation: 27 m

Average elevation: 96 m

Average elevation: 38 m

Average elevation: 32 m

Average elevation: 37 m