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 "layers": [
  {
   "layerId": 0,
   "layerName": "SoilpH",
   "layerType": "Raster Layer",
   "minScale": 0,
   "maxScale": 0,
   "legend": [
    {
     "label": "very strongly alkaline (> 9.0)",
     "url": "b76aeb5c7d8110b7eba3f35b3e83948b",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAD1JREFUOI1jYaAyYKGlgf+pYB4jigt9GUrINmkzQw8DAwONvTxq4KiBowaOGojdQFgRRCZgRDeQkRLTYAAAy0EEkjPWJvoAAAAASUVORK5CYII=",
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     "height": 20,
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    },
    {
     "label": "strongly alkaline (8.5 - 9)",
     "url": "05ad662902e2a8017b45985938922275",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAD1JREFUOI1jYaAyYKGlgf+pYB4jigvzXTvINmni7goGBgYae3nUwFEDRw0cNRC7gbAiiEzAiG4gIyWmwQAATEUGF85M6MQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    },
    {
     "label": "moderately alkaline (7.9 - 8.4)",
     "url": "c1ea3e5d16348728ffba7d248b94bf09",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAD1JREFUOI1jYaAyYKGlgf+pYB4jigtXht0h26TwVSoMDAw09vKogaMGjho4aiB2A2FFEJmAEd1ARkpMgwEAFbcFePy7nVoAAAAASUVORK5CYII=",
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    },
    {
     "label": "slightly alkaline (7.4 - 7.8)",
     "url": "ce3174ac3f7a0dfd365eda2c19e56fa7",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADtJREFUOI1jYaAyYKGlgf+pYB4jqgtVSsg36k4PAwMDjb08auCogaMGjhqIw0BoEUQmYEQ3kJES02AAANemBLvrkdmSAAAAAElFTkSuQmCC",
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    },
    {
     "label": "neutral (6.6 - 7.3)",
     "url": "439139dc6006a7a803e5a0f383f44495",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADdJREFUOI1jYaAyYKGlgf+pYB4jqgttKTDqMISiqZdHDRw1cNTAUQNxGHiYIrMY0Q1kpMg4KAAATS8DFhKfyP0AAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    },
    {
     "label": "slightly acid (6.1 - 6.5)",
     "url": "e2e6255dc5489df032b94d3c18d96c9e",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADtJREFUOI1jYaAyYKGlgf+pYB4jqgtLfMk3qmczAwMDjb08auCogaMGjhqIw0BoEUQmYEQ3kJES02AAAMlnBJIt0+gAAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    },
    {
     "label": "moderately acid (5.6 - 6.0",
     "url": "219174efca426a703508be05db3ac470",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAD1JREFUOI1jYaAyYKGlgf+pYB4jigujO1zJNmlpxW4GBgYae3nUwFEDRw0cNRC7gbAiiEzAiG4gIyWmwQAAUvYGK4S/VE0AAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    },
    {
     "label": "strongly acid (5.1 - 5.5)",
     "url": "176091c8bb4d951b377e5a10327b5d54",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADpJREFUOI1jYaAyYKGlgf+pYB4jigvzV5Bv0sQICE1TL48aOGrgqIGjBmI3EFYEkQkY0Q1kpMg4KAAArxsEPIfWohEAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "height": 20,
     "width": 20
    },
    {
     "label": "very strongly acid (4.5 - 5.0)",
     "url": "5459df9840434c758ebc84e9a9b60b89",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAADpJREFUOI1jYaAyYKGlgf+pYB4jigtXrCDfpIgICE1TL48aOGrgqIGjBmI3EFYEkQkY0Q1kpMg4KAAAm0oEA4O+8bkAAAAASUVORK5CYII=",
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     "height": 20,
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    },
    {
     "label": "extremely acid (3.5 - 4.4)",
     "url": "11871380ad92b32ef53e6293a83bf8ae",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAAAXNSR0IB2cksfwAAAAlwSFlzAAAOxAAADsQBlSsOGwAAAD1JREFUOI1jYaAyYKGlgf+pYB4jiguvX59PtkmamokMDAw09vKogaMGjho4aiB2A2FFEJmAEd1ARkpMgwEA7g0FBiq1k2AAAAAASUVORK5CYII=",
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     "height": 20,
     "width": 20
    },
    {
     "label": "ultra acid (< 3.5)",
     "url": "c1ba4a7bc6a3f48cae92ba32991de3a3",
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