AA_Q18.TIF - Aleutian Arc U.S. EEZ GLORIA sidescan-sonar data mosaic (18 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，简称USGS）开展了四次航次作业，覆盖阿留申弧海域的美国专属经济区（Exclusive Economic Zone，简称EEZ）范围。与此前的EEZ普查勘测工作一致，USGS采用GLORIA侧扫声呐系统（Geological LOng-Range Inclined Asdic，地质长距离倾斜声学声呐）完成了该区域的地质填图。所采集的GLORIA数据经处理与数字镶嵌后，生成了连续的海底影像。该区域共计完成31幅覆盖3°×3°（或更小）区域、像素分辨率为50米的数字镶嵌图。