Hauts-de-France topographic maps

Average elevation: 33 m

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Average elevation: 61 m

Average elevation: 44 m

Average elevation: 2 m

Average elevation: 90 m

Average elevation: 3 m

Average elevation: 137 m

Average elevation: 144 m

Average elevation: 69 m

Average elevation: 132 m

Average elevation: 120 m

Average elevation: 45 m

Average elevation: 85 m

Average elevation: 100 m

Average elevation: 24 m

Average elevation: 121 m

Average elevation: 67 m

Average elevation: 33 m

Average elevation: 77 m

Average elevation: 37 m

Average elevation: 86 m

Average elevation: 34 m

Average elevation: 145 m

Certain extraordinary features were produced when the retreat of the ice sheet had progressed so far as to open an eastward outlet for the marginal lakes. This outlet occurred along the depression between the northward slope of the Appalachian plateau in west-central New York and the southward slope of the…

Average elevation: 136 m

Average elevation: 133 m

Average elevation: 108 m

Average elevation: 194 m

Average elevation: 33 m

Average elevation: 25 m

Average elevation: 21 m

Average elevation: 71 m

Average elevation: 23 m

Average elevation: 106 m

Average elevation: 38 m

Average elevation: 8 m

Average elevation: 60 m

Average elevation: 106 m

Average elevation: 86 m

Average elevation: 133 m

Average elevation: 113 m

Average elevation: 80 m

Average elevation: 4 m

Average elevation: 83 m

Average elevation: 148 m

Average elevation: 90 m