BS_250M_LCC_NAD27.TIF - Bering Sea U.S. EEZ GLORIA sidescan-sonar composite mosaic (LCC, 250 m, Clarke1866)

From 1986 through 1989, the USGS and IOS (Institute of Oceanographic Sciences, U.K.) scientists conducted several surveys within the U.S. EEZ off Alaska. Four surveys during that time period focused on the Bering Sea region. 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 sea-floor. The results of these surveys were 30 digital mosaics of a 2 degree by 2 degree area with a 50-meter pixel resolution.1986年至1989年间，美国地质调查局（USGS）与英国海洋科学研究所（IOS, Institute of Oceanographic Sciences, U.K.）的科研人员在阿拉斯加邻近的美国专属经济区（U.S. EEZ）内开展了多轮科考勘测。此期间共有四项勘测聚焦于白令海海域。与此前的专属经济区侦察勘测一致，美国地质调查局（USGS）采用GLORIA（地质远程倾斜声学侧扫声呐，Geological LOng-Range Inclined Asdic）侧扫声呐系统完成了海底地质填图工作。所采集的GLORIA数据经过处理与数字镶嵌，生成了连续的海底影像。本次勘测的最终成果为30幅覆盖2°×2°海域、像素分辨率达50米的数字镶嵌影像。