INSS INFOMAR Seabed Survey Shallow seismic Sub-Bottom Profile

Sub-bottom profile data shows the rock features and the sediment layers that are below the seabed. A sub-bottom profile is created by sending sound waves from the vessel to the seabed. The length of time it takes for these sound wave to return from the seabed to the vessel is measured. The length of time tells us how hard the material below the seabed is. Hard material such as solid rock returns the sound wave very quickly. Soft material such as mud returns the sound wave very slowly. This map shows where sub-bottom profile data has been collected from the seabed in Irish waters. This data was collected from 1996 to the present date. It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas). The Sub-bottom profile lines show the route of the boat as it collected Sub-bottom profile (SBP) data. We refer to these lines as tracklines. Each line holds information on the vessel name, survey id, no. of lines in each survey, file name, sensor and url’s to download the data and reports. This data shows areas that have been surveyed. There are plans to fill in the missing areas between 2020 and 2026. The deeper offshore waters were mapped as part of the Irish National Seabed Survey (INSS) between 1999 and 2005. INtegrated Mapping FOr the Sustainable Development of Ireland's MArine Resource (INFOMAR) is mapping the inshore areas. (2006 - 2026).浅地层剖面（Sub-bottom profile）数据可揭示海底下方的岩石特征与沉积层。 浅地层剖面（Sub-bottom profile）的生成方式为从作业船向海底发射声波，通过测量声波从海底返回作业船的耗时来推算海底下方物质的坚硬程度：固结岩石等坚硬物质会快速反射声波，而淤泥等松软物质则会延缓声波的返回。 本数据集展示了爱尔兰海域范围内已开展海底浅地层剖面数据采集的区域，数据采集时段为1996年至今。 本数据集属于矢量数据集（vector dataset），矢量数据通过点、线、多边形（面域）来表征地理空间信息。 浅地层剖面测线标注了作业船采集浅地层剖面（Sub-bottom profile，简称SBP）数据的航行轨迹，我们将此类测线称为航迹测线（trackline）。每条测线均包含作业船名称、调查标识、单次调查内的测线数量、文件名、传感器信息以及数据与报告的下载链接。 本数据集同时标注了已完成调查的海域范围，计划于2020年至2026年间完成剩余空白海域的调查工作。1999年至2005年间，爱尔兰国家海底调查（Irish National Seabed Survey, INSS）已完成远海深水海域的制图工作；2006年至2026年期间，爱尔兰海洋资源可持续发展综合制图计划（INtegrated Mapping FOr the Sustainable Development of Ireland's MArine Resource, INFOMAR）则负责近岸海域的制图工作。