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Sub-Bottom Profile (SBP) Tracklines Inshore Ireland WGS84

Category: Science
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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).

Data Resources (4)

WMS
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Data Resource Preview - WMS

Theme Science
Date released 2013-06-20
Date updated 2021-03-09
Dataset conforms to these standards The INSPIRE Directive or INSPIRE lays down a general framework for a Spatial Data Infrastructure (SDI) for the purposes of European Community environmental policies and policies or activities which may have an impact on the environment.
Rights notes Data that is produced directly by the Geological Survey Ireland (GSI) and the Marine Institute (MI) is free for use under the conditions of Creative Commons Attribution 4.0 International license. https://creativecommons.org/licenses/by/4.0/ https://creativecommons.org/licenses/by/4.0/legalcode Under the CC-BY Licence, users must acknowledge the source of the Information in their product or application. Please use this specific attribution statement: "Contains Irish Public Sector Data (Geological Survey Ireland & Marine Institute) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence". In cases where it is not practical to use the statement users may include a URI or hyperlink to a resource that contains the required attribution statement.
Update frequency Annual
Language English
Geographic coverage in GeoJSON format {"type":"Polygon","coordinates":[[[-17.1, 50.1],[-17.1, 57.1], [-5.01, 57.1], [-5.01, 50.1], [-17.1, 50.1]]]}
Spatial Reference Systems (SRS) WGS 84 (EPSG:4326)
Vertical Extent {"maxVerticalExtent": "-1", "verticalDomainName": "sea level", "minVerticalExtent": "-5000"}
Provenance information Sub-bottom data is collected by a vessel while it is out at sea. It is collected in lines. These lines are also referred to as tracklines. The name of the collection instrument is called a Sub-bottom profiler. The Sub-bottom raw data is returned to our main office for final storage. It is also converted into .SEG-Y format. The SEG-Y files are then imported into FME software. In FME the tracklines of their location are produced. The tracklines are reprojected to WGS84 geographic coordinate system. The following workflow in FME are applied to produce the tracklines: 1. Individual SEG-Y files imported into the SEG-Y reader tool 2. A vertex creator then plots the individual trace elements for each SEG-Y file. 3. The plots are then joined and converted to a polyline feature. 4. All the polyline features for the leg are combined to create a merged survey leg trackline product. The Sub-bottom data is then archived into a .Tar file and made available for download via a hyperlink. In 2021, the data structure was reviewed and a new database was created in ArcGIS Enterprise. Using ArcGIS Pro 2.6.3, the dataset was renamed as part of a GSI data standardisation process. A standardised dataset alias was added. A unique id field was added. A new unique identifier was added for each record using an attribute rule. All existing attributes and the geometry were checked. Attribute errors were corrected. Metadata was updated to new GSI standard based on INSPIRE and ISO standards.
Period of time covered (begin) 2003-06-02
Period of time covered (end) 2005-12-31