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   "maxScale": 0,
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     "label": "1:  40-120 acres per square mile",
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     "label": "2:  120-240 acres per square mile",
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     "label": "3:  240-360 acres per square mile",
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     "label": "4:  360-560 acres per square mile",
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     "label": "5:  560-640 acres per square mile",
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     "heading": "Density"
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