EC_250M_AEA_NAD27.TIF - U.S. Atlantic East Coast EEZ GLORIA sidescan-sonar composite mosaic (ACEA, 250 m, Clarke1866)

From February to May 1987 the U.S. Geological Survey (USGS) conducted five cruises to cover the U.S. Atlantic Continental Margin Exclusive Economic Zone (EEZ) seaward of the continental shelf edge, and from the Canadian border southward to the northern Blake Plateau off Florida. 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. A total of 23 digital mosaics of a 2 degree by 2 degree (or smaller) area with a 50-meter pixel resolution were completed for the U.S. Atlantic Continental Margin.

1987年2月至5月，美国地质调查局（U.S. Geological Survey, USGS）执行了五次科考巡航，作业范围覆盖美国大西洋大陆边缘专属经济区（Exclusive Economic Zone, EEZ）大陆架坡折带向海一侧海域，该区域北起加拿大边境，南至佛罗里达州外海的北部布雷克高原。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。本次任务共计为美国大西洋大陆边缘区域完成23幅像素分辨率达50米、覆盖2°×2°（或更小）区域的数字镶嵌图。