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    },
    {
     "label": "Spokane Valley Rathdrum Prairie Aquifer",
     "url": "ae9c43365bf32780553efcc544176791",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAARUlEQVQ4jWNhkHdrZmDmcGSgBvj44CALAzOHI4PfRmuqGLjJn4GFKgYhgVEDRw0cNXDUwFEDYQZ+fHCQYZM/dUz7+2M/ABXBDOUy/aVVAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Sand & gravel",
     "url": "b6ecc08960249db1335b136a7533e9ee",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASElEQVQ4jWNxc2No5uBgcGSgAnjwgOEgCwcHg+PGjQzW1DDQ35+BgYUaBiGDUQNHDRw1cNTAUQOhBj54wHDQ3586hv34wbAfAOWnDIy03rjzAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Bedrock",
     "url": "7dfa889e853e9a918130ee1e404546ef",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAARUlEQVQ4je3MMQ2AMBAAwBt+qCcSkjqplxrBCamVqmBkYUDAj38CLk5mo0uwWdHoF0dGOBAZ0V+FFVZYYYVfuFkjKXu4XxclCDz2zNzMAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    },
    {
     "label": "Clay & silt",
     "url": "94802ebb2db5049aea33e57db38abc29",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASUlEQVQ4jWOJrw9o/s/415GBCoDtJ+9Blv+Mfx1vaWy2poaBajd8GVioYRAyGDVw1MBRA0cNHDUQaiDbT96Dajd8qWIY43/m/QAfaxBg60umDQAAAABJRU5ErkJggg==",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "latah/confining"
     ]
    },
    {
     "label": "Lower sand",
     "url": "75bfbc0d0eca61911705f4c5a645a16b",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASklEQVQ4jWPpC6hvZv3L5MhABfCR98dBFta/TI7BmzWsqWHgWt8bDCzUMAgZjBo4auCogaMGjhoINfAj74+Da31vUMWw38z/9gMAHYYR8cvqlIkAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
      "lower sand"
     ]
    },
    {
     "label": "Sand & gravel overlying basalt",
     "url": "0da991661e300294b12c713d98db1539",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAASElEQVQ4jWNx02do5mBlcGSgAnjwmuEgCwcrg+PGMgZrahjo38XAwEINg5DBqIGjBo4aOGrgqIFQAx+8Zjjo30Udw378ZtgPAHW9DMPfVy7CAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20,
     "values": [
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     ]
    }
   ],
   "legendGroups": [
    {
     "id": "0",
     "heading": "Unit Name"
    }
   ]
  }
 ]
}