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Bathymetry is a measure of how deep the sea is. Knowing the depth of the sea and its shape is vital for creating nautical charts. Accurate charts allow sailors to safely travel the seas. The charts give water depths so sailors can avoid running aground. They also provide locations of dangers such as rocks, sand banks or shipwrecks which may be located in shallow water or have objects such as a ship mast standing upright. This data is used by the United Kingdom Hydrographic Office (UKHO) to update the nautical charts used in Irish Waters.
Seabed maps are useful when building structures on the seabed such as offshore energy devices (wind, tide and wave), bridges and tunnels. The maps help to select the best site for the structure. Understanding the terrain of the seabed will help prevent any disasters or long term problems with a structure. This can be done by avoiding unsuitable seabed terrain or engineering a project to suit the type of seabed terrain it is to be built on.
They are also useful for laying cables and pipelines on the seabed. They help find the best route to lay them and help spot any hazards like shipwrecks.
The maps are important for marine research. They allow us to study how the ocean crust formed and how glaciers once moved over coastal areas. They also help us to model how ocean currents and tides flow around the coastline and predict which coastal areas may be affected by rising sea levels. The maps help us figure out where marine species live, feed, and breed. This is important for fisheries and conservation. |
| summary:
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Bathymetry is a measure of how deep the sea is. Knowing the depth of the sea and its shape is vital for creating nautical charts. Accurate charts allow sailors to safely travel the seas. The charts give water depths so sailors can avoid running aground. They also provide locations of dangers such as rocks, sand banks or shipwrecks which may be located in shallow water or have objects such as a ship mast standing upright. This data is used by the United Kingdom Hydrographic Office (UKHO) to update the nautical charts used in Irish Waters.
Seabed maps are useful when building structures on the seabed such as offshore energy devices (wind, tide and wave), bridges and tunnels. The maps help to select the best site for the structure. Understanding the terrain of the seabed will help prevent any disasters or long term problems with a structure. This can be done by avoiding unsuitable seabed terrain or engineering a project to suit the type of seabed terrain it is to be built on.
They are also useful for laying cables and pipelines on the seabed. They help find the best route to lay them and help spot any hazards like shipwrecks.
The maps are important for marine research. They allow us to study how the ocean crust formed and how glaciers once moved over coastal areas. They also help us to model how ocean currents and tides flow around the coastline and predict which coastal areas may be affected by rising sea levels. The maps help us figure out where marine species live, feed, and breed. This is important for fisheries and conservation. |
| accessInformation:
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Geological Survey Ireland & Marine Institute |
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thumbnail/thumbnail.png |
| maxScale:
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625000 |
| typeKeywords:
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["Data","Service","Image Service","ArcGIS Server"] |
| description:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="text-align:Justify;"><SPAN>This data shows the depth of the seabed around Ireland between 0 and 400 metre depths. The data was collected between 2002 and 202</SPAN><SPAN>2</SPAN><SPAN>. </SPAN></P><P STYLE="text-align:Justify;"><SPAN>Bathymetry is the measurement of how deep is the sea. Bathymetry is the study of the shape and features of the seabed. The name comes from Greek words meaning "deep" and “measure". </SPAN></P><P STYLE="text-align:Justify;"><SPAN>Bathymetry is collected on board boats working at sea and airplanes over land and coastline. The boats use special equipment called a multibeam echosounder. A multibeam echosounder is a type of sonar that is used to map the seabed. Sound waves are emitted in a fan shape beneath the boat. The amount of time it takes for the sound waves to bounce off the bottom of the sea and return to a receiver is used to determine water depth. </SPAN></P><P STYLE="text-align:Justify;"><SPAN>LiDAR (Light Detection and Ranging) is another way to map the seabed, using airplanes. Two laser light beams are emitted from a sensor on-board an airplane. The red beam reaches the water surface and bounces back; while the green beam penetrates the water hits the seabed and bounces back. The difference in time between the two beams returning allows the water depth to be calculated. LiDAR is only suitable for shallow waters (up to 30m depth). </SPAN></P><P STYLE="text-align:Justify;"><SPAN>The data are collected as points in XYZ format. X and Y coordinates and Z (depth). The boat travels up and down the water in a series of lines (trackline). An XYZ file is created for each line and contains thousands of points. The line files are merged together and converted into gridded data to create a Digital Terrain Model of the seabed. </SPAN></P><P STYLE="text-align:Justify;"><SPAN>Colours are also used to show depth ranges. Reds and browns show heights above sea-level. Yellows and greens are shallow waters up to 45m deep. Blues (up to 110m deep) and purple show deeper waters up to 200m deep. </SPAN></P><P STYLE="text-align:Justify;"><SPAN>This is a raster dataset. Raster data stores information in a cell-based manner and consists of a matrix of cells (or pixels) organised into rows and columns. The format of the raster is a grid. The grid cell size is </SPAN><SPAN>10</SPAN><SPAN>m by </SPAN><SPAN>10</SPAN><SPAN>m. This means that each cell (pixel) represents an area on the seabed of </SPAN><SPAN>10</SPAN><SPAN> metres squared. Each cell has a depth value which is the average depth of all the points located within that cell. </SPAN></P><P STYLE="text-align:Justify;"><SPAN>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).</SPAN></P></DIV></DIV></DIV> |
| licenseInfo:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P><SPAN>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. </SPAN></P><P><A href="https://creativecommons.org:443/licenses/by/4.0/" STYLE="text-decoration:underline;"><SPAN>https://creativecommons.org/licenses/by/4.0/</SPAN></A></P><P><A href="https://creativecommons.org:443/licenses/by/4.0/legalcode" STYLE="text-decoration:underline;"><SPAN>https://creativecommons.org/licenses/by/4.0/legalcode</SPAN></A></P><P><SPAN>Under the CC-BY Licence, users must acknowledge the source of the Information in their product or application. </SPAN></P><P><SPAN>Please use this specific attribution statement: </SPAN><SPAN STYLE="font-weight:bold;">"Contains Irish Public Sector Data (Geological Survey Ireland & Marine Institute) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence".</SPAN></P><P><SPAN>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. </SPAN></P></DIV></DIV></DIV> |
| catalogPath:
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| title:
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IE GSI MI Bathymetry 10m Inshore IE WGS84 LAT GRID |
| type:
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Image Service |
| url:
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| tags:
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["Elevation","bathymetry","Bathymetry and Elevation","water depth","IE/GSI","IE/MARINE","seabed","survey","Geological Survey Ireland","Marine Institute","Irish National Seabed Survey","INFOMAR","Joint Irish Bathymetric Survey (JIBS)","InisHydro","CHERISH","MESH"] |
| culture:
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en-US |
| name:
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IE_GSI_MI_Bathymetry_10m_Inshore_IE_WGS84_LAT_GRID |
| guid:
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|
| minScale:
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20000000 |
| spatialReference:
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GCS_WGS_1984 |