De Watten à la forêt d'Eperlecques 4 4 4.4 5.3 6.4 4.2 6.7 5.1 4 4 3.8 4 4.1 3.7 3 3 3 2.8 3 3 3.5 3.8 4 5 5 5 4.9 4.3 3.9 4 3 3 2.8 2.7 2.5 3.7 4.3 5.6 8.1 5.9 4.6 4.2 4.6 3.8 3.9 3.5 3.8 3.7 4 4.4 4.4 4.8 4.9 4.9 5 4.6 4.9 6.2 6.2 5.8 6.1 6.7 10.4 11.6 12.8 12.9 13 13.4 16.2 18.4 21.7 23.1 23.2 24.2 25.4 28.2 30.8 34.5 42.8 48.9 49.8 50.1 50.8 54.3 55.8 56.8 57.8 59.2 61.8 62.3 61.6 58.6 58.2 58.5 58.4 58.8 59.4 59.4 58.8 58.2 58.6 58.6 59 61.2 61.7 60.6 60.6 61.4 61.5 62.2 64.6 65.1 67.4 68.4 69 69.2 70.1 71.4 71.5 71.6 70.9 70.2 69.7 68.1 65.9 62.8 57.9 52.8 41.2 20.6 13.4 11.3 7.3 6.6 6 7.2 6.3 6.2 5.6 3.9 3.7 3 3.5 3 3 2.9 3.3 3.7 4.1 6.8 6.6 5.2 4.3 4 4.1