HW1_Q21.TIF - Hawaii I - Southeastern Hawaiian Ridge U.S. EEZ GLORIA sidescan-sonar data mosaic (21 of 29) (LCC, 50 m, WGS84)

Survey of the southeastern Hawaiian Ridge was the fifth major segment of the Exclusive Economic Zone (EEZ) mapping program to have been initiated. Data acquisition for this region required approximately one-half year and were acquired during eight cruises over a four year period from 1986 through 1989, skipping 1987. At the conclusion of the survey 29 mosaics of a 2 degree by 2 degree were completed for the region. 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 twenty-seven digital mosaics of a 2 degree by 2 degree area and 2 mosaics of 2.25 degree by 2 degree with a 50-meter pixel resolution were completed for the region.

夏威夷海岭东南部勘测是已启动的专属经济区（Exclusive Economic Zone，EEZ）测绘项目的第五个主要作业分段。该区域的数据采集工作耗时约半年，于1986年至1989年的四年间通过8次航次完成，期间未安排1987年的航次作业。勘测完成之际，该区域共完成29幅2°×2°规格的拼接图件。与此前的EEZ普查勘测工作一致，美国地质调查局（United States Geological Survey，USGS）采用GLORIA（Geological LOng-Range Inclined Asdic）侧扫声呐系统开展地质测绘工作。采集得到的GLORIA数据经过处理与数字拼接，生成了连续的海底地貌影像。该区域最终共完成27幅2°×2°区域的数字拼接图件，以及2幅像素分辨率为50米的2.25°×2°区域拼接图件。