Sidescan Sonar point shapefile and ASCII navigation files collected by the U.S. Geological Survey in the Madison Swanson and Steamboat Lumps Marine Protected Areas, Gulf of Mexico in 2000 (Geographic, WGS 84)
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The U.S. Geological Survey (USGS) mapped approximately 22 square miles of the Madison Swanson Marine Protected Area (MPA) and Steamboat Lumps MPA, which are located...
美国地质调查局（U.S. Geological Survey, USGS）已完成对麦迪逊·斯旺森海洋保护区（Madison Swanson Marine Protected Area, MPA）与汽船暗礁海洋保护区（Steamboat Lumps MPA）共计约22平方英里海域的测绘，上述两座海洋保护区坐落于……
