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 "layers": [
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   "layerId": 0,
   "layerName": "Geomorphic_Features_Antarctic_Margin",
   "layerType": "Feature Layer",
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   "maxScale": 0,
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     "label": "No data",
     "url": "f4877e8b083e3084b76430b9e76b7ff9",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAHRJREFUOI3d1EsOgCAMBFBNet2epgfWVRPoT5ziRlYUw5NpAnRsHvQZyMxXFxORk+yC4tG8qvVALjKCjfsnsIs5EMXG/peR39RhD1HsMTKKhZHRk6bgP3tYRkaw5au3iqWRu5gDUSztoX0Tq9p+0x+QXeiOG5EkB74NI1CRAAAAAElFTkSuQmCC",
     "contentType": "image/png",
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     "contentType": "image/png",
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     "values": [
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     "label": "Shelf Deep",
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     "label": "Structural Slope",
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     "contentType": "image/png",
     "height": 20,
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     "values": [
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    {
     "label": "Trench",
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgc+8Gf5TYpDUVgZGFAOpBUYNHDVw1MBRA+lsIKw8o5qB1AIAT8IEIad/CqEAAAAASUVORK5CYII=",
     "contentType": "image/png",
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     "values": [
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    },
    {
     "label": "Trough",
     "url": "39330e229f6a7b46422b2b625d18f616",
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     "contentType": "image/png",
     "height": 20,
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     "values": [
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    },
    {
     "label": "Trough Mouth Fan",
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     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADFJREFUOI1jYaAyYKGZgfN2X/9PiUFJrpqMKAZSC4waOGrgqIGjBtLZQFh5RjUDqQUA94QFIuFjiQ8AAAAASUVORK5CYII=",
     "contentType": "image/png",
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     "values": [
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    {
     "label": "Upper Slope",
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     "contentType": "image/png",
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     "values": [
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     "label": "Volcano",
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}