{"thcode":3,"term":{"code":575,"name":"islands","parent":599,"scope":"Tracts of land smaller than a continent, surrounded by the water of an ocean, sea, lake or stream. [Glossary of Geology, 4th ed.]"},"uf":[{"name":"atolls","usewith":false},{"name":"cays","usewith":false},{"name":"island arcs","usewith":false},{"name":"isles","usewith":false},{"name":"islets","usewith":false},{"name":"keys (islands)","usewith":false},{"name":"land-tied islands","usewith":false},{"name":"mangrove islands","usewith":false}],"bt":[{"code":599,"name":"land regions","parent":928,"scope":"Use for land areas distinguished from ocean areas as well as general land-based regions without a more specific type designation."},{"code":928,"name":"regions","parent":1,"scope":"(a) Large, indefinite portions of the earth's surface. (b) Specified districts or territories. (c) Areas of interest or activity; spheres. (d) Ecology. Parts of the earth characterized by distinctive animal or plant life. [Adapted from American Heritage Dic. of the English Language, 4th ed.]"},{"code":1,"name":"Categories","parent":null,"scope":null}],"nt":[{"code":54,"name":"archipelagos","parent":575,"scope":"Seas or areas in a sea that contain numerous islands; also, the island groups themselves. [Glossary of Geology, 4th ed.]"}],"rt":[{"code":92,"name":"bars (physiographic)","parent":816,"scope":"Natural accumulations of sand, gravel, or other material forming an underwater or exposed embankment. [USGS Circ 1048]"}]}