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   "layerId": 0,
   "layerName": "Azzonamento acustico",
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWMpaO9vYeDkcWCgBvj+5QALyDBm/xRrapj3d+McBhYGKgOWUQMpBiyUG4EKRg2kHLBQwQwUMGrgyAjD718OgEpaqoDvXw4AAE76EItfhVh/AAAAAElFTkSuQmCC",
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     "label": "Classe V - Aree prevalentemente industriali",
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     "groupId": "0",
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     "label": "Classe VI - Aree esclusivamente industriali",
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAATklEQVQ4jWPpDw1t4fnxw4GBCuALB8cBFpBhKZs3W1PDwDm+vgwsDFQGLKMGUgxYKDcCFYwaSDlgoYIZKGDUwBERhl84OA6ASlpqAJBZABsMEEPJw84rAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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   ],
   "legendGroups": [
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