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   "layerName": "GEBCO_2022_TID_32bit_COG.tif",
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   "maxScale": 0,
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     "label": "Land",
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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Singlebeam - depth value collected by a single beam echo-sounder",
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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Multibeam - depth value collected by a multibeam echo-sounder",
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     "contentType": "image/png",
     "groupId": "0",
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    {
     "label": "Seismic - depth value collected by seismic methods",
     "url": "71e9ad13fb884805cff838c05c9f1e71",
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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Isolated sounding - depth value that is not part of a regular survey or trackline",
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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "ENC sounding - depth value extracted from an Electronic Navigation Chart (ENC)",
     "url": "71e9ad13fb884805cff838c05c9f1e71",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAG0lEQVQ4jWNhoDJgGTVw1MBRA0cNHDVwpBoIABArAFHmDwDcAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Lidar - depth derived from a bathymetric lidar sensor",
     "url": "71e9ad13fb884805cff838c05c9f1e71",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAG0lEQVQ4jWNhoDJgGTVw1MBRA0cNHDVwpBoIABArAFHmDwDcAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
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    },
    {
     "label": "Depth measured by optical light sensor",
     "url": "71e9ad13fb884805cff838c05c9f1e71",
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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Combination of direct measurement methods",
     "url": "71e9ad13fb884805cff838c05c9f1e71",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAG0lEQVQ4jWNhoDJgGTVw1MBRA0cNHDVwpBoIABArAFHmDwDcAAAAAElFTkSuQmCC",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Predicted based on satellite-derived gravity data - depth value is an interpolated value guided by satellite-derived gravity data",
     "url": "62ddecbabf711d44dd8177a5789c4755",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAKUlEQVQ4jWNhoDJgoaWB/yk0ixHdQKqAUQNHDRw1cNRA+hvISG0DqQIAtswBUpeLkgQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Interpolated based on a computer algorithm - depth value is an interpolated value based on a computer algorithm (e.g. Generic Mapping Tools)",
     "url": "62ddecbabf711d44dd8177a5789c4755",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAKUlEQVQ4jWNhoDJgoaWB/yk0ixHdQKqAUQNHDRw1cNRA+hvISG0DqQIAtswBUpeLkgQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Digital bathymetric contours from charts - depth value taken from a bathymetric contour data set",
     "url": "62ddecbabf711d44dd8177a5789c4755",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAKUlEQVQ4jWNhoDJgoaWB/yk0ixHdQKqAUQNHDRw1cNRA+hvISG0DqQIAtswBUpeLkgQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": " Digital bathymetric contours from ENCs - depth value taken from bathymetric contours from an Electronic Navigation Chart (ENC)",
     "url": "62ddecbabf711d44dd8177a5789c4755",
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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Bathymetric sounding - depth value at this location is constrained by bathymetric sounding(s) within a gridded data set where interpolation between sounding points is guided by satellite-derived gravity data",
     "url": "62ddecbabf711d44dd8177a5789c4755",
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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Predicted based on helicopter/flight-derived gravity data",
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     "groupId": "0",
     "height": 20,
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    },
    {
     "label": "Depth estimated by calculating the draft of a grounded iceberg using satellite-derived freeboard measurement.",
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     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": " Pre-generated grid - depth value is taken from a pre-generated grid that is based on mixed source data types, e.g. single beam, multibeam, interpolation etc.",
     "url": "62ddecbabf711d44dd8177a5789c4755",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAKUlEQVQ4jWNhoDJgoaWB/yk0ixHdQKqAUQNHDRw1cNRA+hvISG0DqQIAtswBUpeLkgQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Unknown source - depth value from an unknown source",
     "url": "62ddecbabf711d44dd8177a5789c4755",
     "imageData": "iVBORw0KGgoAAAANSUhEUgAAABQAAAAUCAYAAACNiR0NAAAACXBIWXMAAA7EAAAOxAGVKw4bAAAAKUlEQVQ4jWNhoDJgoaWB/yk0ixHdQKqAUQNHDRw1cNRA+hvISG0DqQIAtswBUpeLkgQAAAAASUVORK5CYII=",
     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    },
    {
     "label": "Steering points - depth value used to constrain the grid in areas of poor data coverage",
     "url": "62ddecbabf711d44dd8177a5789c4755",
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     "contentType": "image/png",
     "groupId": "0",
     "height": 20,
     "width": 20
    }
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   "legendGroups": [
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