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Four major cover types were identified from the source imagery (i.e., Algae, Seagrass, Mangrove and No Cover) and combined with three modifiers describing the distribution of the dominant cover within the polygon (i.e.,10%-50%, 50%-90%, and 90%-100%). \"Unknown\" indicates that the structure type was indistinguishable in the aerial orthophotos, LiDAR or acoustic imagery due interference with the signature of the seafloor.", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 102100, "latestWkid": 3857, "xyTolerance": 0.001, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -20037700, "falseY": -30241100, "xyUnits": 10000, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 }, "copyrightText": "NOAA/NOS/NCCOS/MSE/Biogeography Branch", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "referenceScale": 0.0, "drawingInfo": { "renderer": { "type": "uniqueValue", "field1": "M_COVER", "field2": "P_COVER", "uniqueValueGroups": [ { 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