AA_Q05.TIF - Aleutian Arc U.S. EEZ GLORIA sidescan-sonar data mosaic (5 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）先后开展四次科考巡航，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普查航次一致，本次作业采用GLORIA侧扫声呐系统（Geological LOng-Range Inclined Asdic）完成地质填图工作。采集所得的GLORIA数据经处理与数字镶嵌后，生成了连续的海底地貌影像。本次任务共为目标海域完成31幅覆盖3°×3°（或更小）区域的数字镶嵌图，其像素分辨率达50米。