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5次科考航次，作业海域覆盖美国大西洋大陆边缘专属经济区（Exclusive Economic Zone, EEZ）大陆架外侧区域，北起加拿大边境，向南延伸至佛罗里达州外的北布莱克海台。与此前的专属经济区普查航次一致，本次科考采用GLORIA（地质长距离倾斜声学海底扫描声呐，Geological LOng-Range Inclined Asdic）侧扫声呐系统完成地质填图工作。采集所得的GLORIA数据经处理与数字镶嵌后，生成连续的海底地貌影像。本次科考共为美国大西洋大陆边缘区域完成23幅像素分辨率为50米的2°×2°（或更小范围）区域数字镶嵌图。