PR_250M_AEA_NAD27.TIF - Puerto Rico U.S. EEZ GLORIA sidescan-sonar composite mosaic (ACEA, 250 m, Clarke1866)

From 4 November to 3 December 1985 the U.S. Geological Survey (USGS) conducted a single cruise to map the entire sea-floor of the Exclusive Economic Zone (EEZ) of Puerto Rico and the U.S. Virgin Islands. 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 9 digital mosaics of a 2 degree by 2 degree (or smaller) area with a 50-meter pixel resolution were completed for the U.S. Puerto Rico EEZ.

1985年11月4日至12月3日，美国地质调查局（U.S. Geological Survey，USGS）执行单次科考航次，对波多黎各与美属维尔京群岛专属经济区（Exclusive Economic Zone，EEZ）的全部海底开展测绘制图工作。与此前的专属经济区普查航次一致，本次作业采用GLORIA（地质远程倾斜声呐成像系统，Geological LOng-Range Inclined Asdic）旁扫声呐系统完成地质测绘。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。最终为美国波多黎各专属经济区完成了9幅覆盖范围为2°×2°（或更小）、像素分辨率达50米的数字镶嵌影像。