One-Minute Navigation Shapefile of Seismic-Reflection Data Collected in Eastern Rhode Island Sound in 1975 (A75_6_1MINNAV_SORT.SHP)

During 1975, the U.S. Geological Survey (USGS) conducted a seismic-reflection survey utilizing Uniboom seismics in eastern Rhode Island Sound aboard the Research Vessel Asterias. This cruise totalled 8 survey days. Data from this survey were recorded in analog form and archived at the USGS. Due to recent interest in the geology of Rhode Island Sound and in an effort to make the data more readily accessible while preserving the original paper records, the seismic data from this cruise were scanned and converted to TIFF images and SEG-Y data files. Navigation data were converted from LORAN-C time delays to latitudes and longitudes, which are available in ESRI shapefile format and as eastings and northings in space-delimited text format.

1975年，美国地质调查局（U.S. Geological Survey，USGS）搭乘“阿斯特里亚斯号”研究船（Research Vessel Asterias），在罗得岛湾东部开展了采用Uniboom地震勘探（Uniboom seismics）的地震反射勘探作业。本次勘探共计8个勘测日，采集的数据以模拟格式记录并存档于USGS。近年来，随着学界对罗得岛湾地质研究兴趣的提升，为在保留原始纸质记录的前提下提升数据可访问性，本次勘探的地震数据已被扫描并转换为TIFF图像文件（TIFF）与SEG-Y数据文件（SEG-Y）。导航数据由罗兰-C（LORAN-C）时间延迟值转换为经纬度坐标，相关数据以ESRI形状文件（ESRI shapefile）格式提供，同时也以空格分隔的文本格式提供东向坐标与北向坐标值。