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   "layerId": 0,
   "layerName": "Période de construction",
   "layerType": "Feature Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "avant 1800",
     "url": "e560c18f7aa1b17e829e6588e79debc2",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAa0lEQVQ4jWNhoDJgGdkGclJo1ndkAzkbGhz2s7GR7+Cqqj2eDAwM72EmcPDzc5hzcbGSZdi3b7/h7KEVKaMGDjYDv3//c/L79z9kGfLr1x8GBgaGH8gGvq+q2uNIoeNQsh5cgFIwhCKFWgAARxwZCfRPpTgAAAAASUVORK5CYII=",
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     "groupId": "0",
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     "label": "de 1801 à 1850",
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     "label": "de 1851 à 1914",
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     "label": "de 1915 à 1939",
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAYklEQVQ4jWNhoDJgGdkGclJo1ndkAzlXOTDs56TAvb57GDwZGBjew4zgEOVgMOdlJc+wz78R7KEVKaMGDjYDv/xhOPnlD3mGfIfo+4Fs4HvfPQyOlLkNNevBBSgFQyhSqAUANO4TaKQkXLgAAAAASUVORK5CYII=",
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     "groupId": "0",
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     "label": "de 1940 à 1967",
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAZ0lEQVQ4jWNhoDJgGdkGclJo1ndkAzn3ZTHs52Qj3zTLCQyeDAwM72EGckjwMZjzc5Bn2McfCPbQipRRAwebgR9/MJxETk+kgO+/GBgYGBh+IBv43nICgyNlbkPNenABSsEQihRqAQDtcBMhki0kWgAAAABJRU5ErkJggg==",
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     "groupId": "0",
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     "label": "de 1968 à 1975",
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAZ0lEQVQ4jWNhoDJgGdkGclJo1ndkAzlPdjHs52Yn3zSdfAZPBgaG9zADOSQFGcwFuMkz7MNXBHtoRcqogYPNwE/fGE5++kaeIV9/MjAwMDD8QDbwvU4+gyNlbkPNenABSsEQihRqAQC7uhLys5gpPgAAAABJRU5ErkJggg==",
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     "groupId": "0",
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     "values": [
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     "label": "de 1976 à 1981",
     "url": "cca598ab84670ecb522b9cdbf500f0a9",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAaklEQVQ4jWNhoDJgGdkGclJo1ndkAzmzsvbtZ2Mj38wJEyw9GRgY3sMM5ODjkzDn4OAny7AfPz7C2UMrUkYNHGwG/vjx8SRyeiIF/Pr1nYGBgeEHsoHvJ0ywdKTQcShZDy5AKRhCkUItAADsdRiphYUqEwAAAABJRU5ErkJggg==",
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     "groupId": "0",
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     "values": [
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     "label": "de 1982 à 1989",
     "url": "2fa2565ebff8383083f1625c70a32ef9",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAbElEQVQ4jWNhoDJgGdkGclJo1ndkAzm9urbsZ2En38xN+c6eDAwM72EGcnAKipuzcfORZdivr5/g7KEVKaMGDjYDf3/7dPL3t0/41OIEf35+Z2BgYPiBbOD7TfnOjhQ6DiXrwQUoBUMoUqgFAPaoGLZP9z6DAAAAAElFTkSuQmCC",
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     "groupId": "0",
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     "label": "de 1990 à 1999",
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     "label": "de 2000 et plus",
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     "values": [
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     "label": "2008 et plus",
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     "groupId": "0",
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     "values": [
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    },
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     "label": "non daté",
     "url": "48f926ebab57b899bb0607632118954b",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAa0lEQVQ4jWNhoDJgGdkGclJo1ndkAzlXrVq1n5OTfDN9fX09GRgY3sMM5BAVFTXn5eUly7DPnz/D2UMrUkYNHGwGfvny5eSXL1/IMuT79+8MDAwMP5ANfO/r6+tIoeNQsh5cgFIwhCKFWgAAbmEYMjbT8QgAAAAASUVORK5CYII=",
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     "values": [
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   "legendGroups": [
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