HW1_Q25.TIF - Hawaii I - Southeastern Hawaiian Ridge U.S. EEZ GLORIA sidescan-sonar data mosaic (25 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专属经济区（Exclusive Economic Zone，EEZ）测绘项目中第五个启动的核心分段。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次考察航次完成数据获取，期间未开展1987年的航次作业。勘测工作结束时，该区域共完成29幅2°×2°的镶嵌图。与早期EEZ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，地质长距离倾斜声呐系统）侧扫声呐系统完成地质测绘任务。采集到的GLORIA数据经处理与数字镶嵌后，生成了连续的海底影像。本次勘测最终共完成27幅2°×2°区域的数字镶嵌图，以及2幅2.25°×2°区域的数字镶嵌图，像素分辨率均为50米。