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The original source of this data is unclear. Based on the attribute data it appears that the storage tank locations were digitized from old Department of Defense Maps, aerial maps from 1976, and from Google Maps aerial photography 2005. Some attributes are populated with type of tank and owner information. It is unknown whether the data depicts all storage tanks within the City of Unalaska, or if the ones depicted are accurate.<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "copyrightText": "Original source of data unclear. 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