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The entire data set is comprised of the following components: yearly inventories (feature classes) starting in 1989, excluding 1993 (kelpYYYY), a combined inventory from all years (kelp_all_years), a combined inventory of kelp observations from the five most recent years (kelp_recent_5yr), a spatial index (polygon and point feature classes) delineating the geographic extent of monitoring sub-areas (map_index, map_index_pts), and tabular data describing kelp characteristics for each year that link to the spatial index (summary_kelp_stats). Users who wish to use the most precise inventory estimates and compare area over multiple years should use the tabular summary tables which summarize area by map_index. The tabular estimates are more precise because they are based on the source imagery. The area estimates in the feature classes reflect subsequent processing. Methods of subsequent processing have varied with changes in technology since 1989, resulting in noticeable differences among years in the spatial data that preclude detailed comparison of spatial data across years. Major methodological changes include: 1) a format change from vector (CAD) in 1989 to raster (20 m cell size) in 1994; 2) In 2010, the resolution changed from 20 meter to 4 meter resolution.", "geometryType": "esriGeometryPoint", "sourceSpatialReference": { "wkid": 2927, "latestWkid": 2927, "xyTolerance": 0.003280833333333333, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -117498300, "falseY": -98850300, "xyUnits": 3048.0060960121928, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 }, "copyrightText": "This dataset is primarily funded and managed by Washington State Department of Natural Resources, through the Nearshore Habitat Program. Other supporters and collaborators include: NOAA's Olympic Coast National Marine Sanctuary, Washington State Department of Transportation, Washington State Department of Ecology's Coastal Zone Management Act, and Washington State Coastal Protection Fund.", "parentLayer": null, "subLayers": [], "minScale": 0, "maxScale": 0, "referenceScale": 0.0, "drawingInfo": { "renderer": { "type": "uniqueValue", "field1": "species", "uniqueValueInfos": [ { "symbol": { "type": "esriSMS", "style": "esriSMSCircle", "color": [ 223, 115, 255, 255 ], "size": 5, "angle": 0, "xoffset": 0, "yoffset": 0, "outline": { "color": [ 132, 0, 168, 255 ], "width": 0.5 } }, "value": "Bull Kelp & Giant Kelp Present", "label": "Bull Kelp & Giant Kelp" }, { "symbol": { "type": "esriSMS", "style": "esriSMSCircle", "color": [ 255, 170, 0, 255 ], "size": 5, "angle": 0, "xoffset": 0, "yoffset": 0, "outline": { "color": [ 168, 112, 0, 255 ], "width": 0.5 } }, "value": "Bull Kelp Only", "label": "Bull Kelp Only" }, { "symbol": 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