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As a composite of these three phases, the migratory pathway in this dataset extends over the depth range 15-65 m including the Westermost depth contour, the shallowest Easternmost contour for migration without calves, and the shallowest Easternmost contour of migration of mothers with calves.While this layer shows the primary migratory pathway, gray whales often occur both in shallower and deeper waters.", "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": "Data preparation: Andy Lanier, Coastal Resources Specialist, Oregon Dept. of Land Conservation and Development (DLCD) Coastal Management Program, by contract with the Oregon Dept.of Fish and Wildlife (ODFW) Marine Resources Program\n\nSource data: Marine Mammal 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