AA_Q22B.TIF - Aleutian Arc U.S. EEZ GLORIA sidescan-sonar data mosaic (31 of 31) (LCC, 50 m, WGS84)

During late July through September 1987 and June and July 1988 the U.S. Geological Survey (USGS) conducted four cruises to cover the U.S. Exclusive Economic Zone (EEZ) region of the Aleutian Arc. 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 31 digital mosaics of a 3 degree by 3 degree (or smaller) area with a 50-meter pixel resolution were completed for the region.

1987年7月下旬至9月，以及1988年6月和7月，美国地质调查局（U.S. Geological Survey，USGS）先后开展四次巡航作业，覆盖阿留申弧海域的美国专属经济区（Exclusive Economic Zone，EEZ）范围。与此前的EEZ普查勘测一致，USGS采用GLORIA（地质远程倾斜声呐系统，Geological LOng-Range Inclined Asdic）侧扫声呐（sidescan-sonar）系统完成该区域的地质填图工作。所采集的GLORIA数据经过处理与数字镶嵌处理后，生成了连续的海底地貌影像。本次作业共计为该区域完成了31幅面积为3°×3°（或更小）、像素分辨率达50米的数字镶嵌影像。