var tab_hauteur_zoom = {"z4" : "23.725217704707838",
						"z5" : "11.852246179982295",
						"z6" : "5.923732091720083",
						"z7" : "2.96113114593944",
						"z8" : "1.4805268440812824",
						"z9" : "0.7402585727489992",
						"z10" : "0.3701353651809143",
						"z11" : "0.18506760679637324",
						"z12" : "0.09253379392368544",
						"z13" : "0.046266791320036305",
						"z14" : "0.023133421626361894",
						"z15" : "0.011566710794667756",
						"z16" : "0.005783353762858212",
						"z17" : "0.0028916772891776077"};

var tab_limites_carte = {'z8': [50.1,48.4,6.02,7.5],
					'z9': [49.9,48.0,5.45,7.5],
					'z10': [49.75,47.9,5.15,7.6],
					'z11': [49.68,47.85,5,7.61],
					'z12': [49.65,47.84,4.95,7.63],
					'z13': [49.635,47.83,4.91,7.63],
					'z14': [49.625,47.82,4.9,7.635],
					'z15': [49.621,47.818,4.89,7.638],
					'z16': [49.6193,47.815,4.89,7.639],
					'z17': [49.6183,47.814,4.89,7.64]
					};