CYM_Q01.TIF - Cayman Trough GLORIA sidescan-sonar data mosaic (1 of 2) (Mercator, 50m, Clarke 1866)

From October 22 to November 22, 1985 the U.S. Geological Survey (USGS) conducted a single to survey to ensonify the Cayman Trough region. The survey took place over the coastal region of the spreading ridge and along one line to the eastern extremity of the Trough. As in earlier EEZ reconnaissance surveys, the USGS utilized the GLORIA (Geological LOng-Range Inclined Asdic) sidescan-sonar system to complete the geologic mapping. The collected GLORIA data were processed and digitally mosaicked to produce continuous imagery of the seafloor. A total of 2 digital mosaics of a 2 degree by 2 degree area with a 50-meter pixel resolution were completed for the Cayman Trough south of the Cayman Islands.

1985年10月22日至11月22日，美国地质调查局（U.S. Geological Survey, USGS）针对开曼海槽区域开展单次声呐测绘勘测。本次勘测覆盖扩张脊的沿海区域，并沿一条测线延伸至海槽东端。如同此前的专属经济区（Exclusive Economic Zone, EEZ）普查勘测工作，美国地质调查局采用GLORIA（地质长距离倾斜声呐系统，Geological LOng-Range Inclined Asdic）侧扫声呐系统完成地质填图作业。所采集的GLORIA数据经处理与数字化镶嵌后，生成了连续的海底地貌影像。针对开曼群岛以南的开曼海槽区域，共完成两幅像素分辨率为50米、覆盖范围为2°×2°的数字化镶嵌影像。