AA_Q02.TIF - Aleutian Arc U.S. EEZ GLORIA sidescan-sonar data mosaic (2 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、7月期间，美国地质调查局（U.S. Geological Survey，USGS）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，本次作业采用GLORIA（Geological LOng-Range Inclined Asdic，地质长距离倾斜声呐侧扫系统）侧扫声呐系统完成地质填图工作。所采集的GLORIA数据经处理与数字镶嵌后，生成了连续的海底地貌影像。该区域最终共完成31幅覆盖面积为3°×3°（或更小）、像素分辨率为50米的数字镶嵌图。