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In Great Bay, extensive and sometimes dense eelgrass was found, roughly comparable to the 1996 findings, which showed the greatest eelgrass distribution mapped to date. The 1981 eelgrass distribution and cover map for the Great Bay Estuary represents an \u201cearliest available\u201d comprehensive map of the resource, as no earlier photography has been found with adequate tidal conditions to allow eelgrass mapping.", "geometryType": "esriGeometryPolygon", "sourceSpatialReference": { "wkid": 102710, "latestWkid": 3437, "xyTolerance": 0.0032808333333333335, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -17463700, "falseY": -48257000, "xyUnits": 3048.0060960121914, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 }, "spatialReference": { "wkid": 102710, "latestWkid": 3437, "xyTolerance": 0.003280833333333333, "zTolerance": 0.001, "mTolerance": 0.001, "falseX": -17463700, "falseY": -48257000, "xyUnits": 1.3724607682899535E8, "falseZ": -100000, "zUnits": 10000, "falseM": -100000, "mUnits": 10000 }, "copyrightText": "Dr. Frederick Short, University of New Hampshire, Durham, NH", "parentLayer": null, "subLayers": [], "minScale": 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