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snippet:
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Download survey leg reports and bathymetry, backscatter and sub-bottom profile data. Data available in various formats in WGS84 and UTM29N projections.
Bathymetry is a measure of how deep the sea is. Backscatter shows how hard or soft the seabed is. Sub-bottom profile data shows the rock features and the sediment layers that are below the seabed.
Knowing the depth, shape and hardness of the seabed is important for a range of reasons such as: making nautical maps, planning, fishing, coastal heritage and marine life habitats.
Vessels such as fishing boats, oil tankers, ferries or yachts, for example, do not want to hit any underwater hazards such as rocks, sand banks or shipwrecks. The nautical maps they use to navigate are made using accurate data about the seabed.
The data is important in planning sites for wind, wave and tidal energy, fish farming and the laying of cables and pipelines. Pipes, internet cables, wind farms all need to be anchored to the seabed so knowing what material makes up the seabed such as rocks, mud and sand is really useful.
Mapping the seabed allows us to identify shipwrecks.
The seabed is also home to lots of marine life and seabed data allows us to map and monitor this different ecosystems and habitats of the seabed. Marine life such as Kelp, scallops, shrimp and mussels. |
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summary:
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Download survey leg reports and bathymetry, backscatter and sub-bottom profile data. Data available in various formats in WGS84 and UTM29N projections.
Bathymetry is a measure of how deep the sea is. Backscatter shows how hard or soft the seabed is. Sub-bottom profile data shows the rock features and the sediment layers that are below the seabed.
Knowing the depth, shape and hardness of the seabed is important for a range of reasons such as: making nautical maps, planning, fishing, coastal heritage and marine life habitats.
Vessels such as fishing boats, oil tankers, ferries or yachts, for example, do not want to hit any underwater hazards such as rocks, sand banks or shipwrecks. The nautical maps they use to navigate are made using accurate data about the seabed.
The data is important in planning sites for wind, wave and tidal energy, fish farming and the laying of cables and pipelines. Pipes, internet cables, wind farms all need to be anchored to the seabed so knowing what material makes up the seabed such as rocks, mud and sand is really useful.
Mapping the seabed allows us to identify shipwrecks.
The seabed is also home to lots of marine life and seabed data allows us to map and monitor this different ecosystems and habitats of the seabed. Marine life such as Kelp, scallops, shrimp and mussels. |
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extent:
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[[-25.887672,46.745938],[-3.56636350399998,63.191624447]] |
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accessInformation:
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Contains Irish Public Sector Data (Geological Survey Ireland & Marine Institute) licensed under a Creative Commons Attribution 4.0 International (CC BY 4.0) licence |
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thumbnail:
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thumbnail/thumbnail.png |
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maxScale:
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1.7976931348623157E308 |
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typeKeywords:
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["Data","Service","Map Service","ArcGIS Server"] |
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description:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:8 0 0 0;"><SPAN>This data shows</SPAN><SPAN> areas where</SPAN><SPAN> survey leg report and bathymetry, backscatter and sub-bottom profile data</SPAN><SPAN> </SPAN><SPAN>exists and allows you to download the data. </SPAN><SPAN>The data was collected between </SPAN><SPAN>1996</SPAN><SPAN> and 2021.</SPAN></P><P STYLE="margin:8 0 0 0;"><SPAN><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></SPAN></P><P STYLE="margin:8 0 0 0;"><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. The strength of the sound wave is used to determine how hard the bottom of the sea is. In other words, backscatter is the measure of sound that is reflected by the seafloor and received by the sonar. A strong sound wave indicates a hard surface (rocks, gravel), and a weak return signal indicates a soft surface (silt, mud).</SPAN><SPAN> </SPAN><SPAN /></P><P STYLE="margin:8 0 0 0;"><SPAN>Another piece of equipment is used called a sub-bottom profiler.</SPAN><SPAN>Sub-bottom profile data shows the rock features and the sediment layers that are below the seabed. </SPAN></P><P STYLE="margin:8 0 0 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>LiDAR 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="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>This data shows areas which have data available for download in Irish waters. </SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>It is a vector dataset. Vector data portray the world using points, lines, and polygons (areas).</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN>This data is shown as polygons. Each polygon holds information on the </SPAN><SPAN>survey leg details (name, vessel, year,date etc). It also provides links where available to download </SPAN><SPAN>bathymetry</SPAN><SPAN> </SPAN><SPAN>(GEOTIFF, ESRI GRID</SPAN><SPAN>, xyz</SPAN><SPAN>),</SPAN><SPAN> </SPAN><SPAN>backscatter</SPAN><SPAN> </SPAN><SPAN>(GEOTIFF), survey report (pdf) and sub-bottom profile (SEGY) data in various formats.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>The data available for download are raster datasets. Raster data is another name for gridded data. Raster data stores information in pixels (grid cells). Each raster grid makes up a matrix of cells (or pixels) organised into rows and columns.</SPAN></SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN>This data was collected using a boat or plane. Data is output in xyz format. X and Y are the location and Z is the depth or backscatter value. A software package converts it into gridded data. The grid cell size varies. </SPAN><SPAN>If the </SPAN><SPAN>resolution</SPAN><SPAN> is </SPAN><SPAN>10m </SPAN><SPAN> - </SPAN><SPAN> Each grid cell size is 10 meter by 10 meter. This means that each cell (pixel) represents an area of 10 meter squared.</SPAN></P><P STYLE="margin:0 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><SPAN><SPAN>ESRI GRID datasets contain the depth value. This means you can click on a location and get its depth.</SPAN></SPAN></P><P STYLE="margin:8 0 0 0;"><SPAN>GEOTIFFS are images of the data and only record colour values. We use software to create a 3D effect of what the seabed looks like. By using vertical exaggeration, artificial sun-shading (mostly as if there is a light source in the northwest) and colouring the depths using colour maps, it is possible to highlight the subtle relief of the seabed. The darker shading represents a deeper depths and lighter shading represents shallower depths.</SPAN></P><P STYLE="margin:8 0 0 0;"><SPAN>The gridded XYZ data is also available.</SPAN></P><P STYLE="margin:8 0 0 0;"><SPAN /></P><P STYLE="margin:0 0 0 0;"><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> |
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licenseInfo:
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<DIV STYLE="text-align:Left;"><DIV><DIV><P STYLE="margin:0 0 14 0;"><SPAN><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></SPAN></P><P STYLE="margin:0 0 14 0;"><A href="https://creativecommons.org/licenses/by/4.0/" STYLE="text-decoration:underline;"><SPAN STYLE="text-decoration:underline;"><SPAN>https://creativecommons.org/licenses/by/4.0/</SPAN></SPAN></A></P><P STYLE="margin:0 0 14 0;"><A href="https://creativecommons.org/licenses/by/4.0/legalcode" STYLE="text-decoration:underline;"><SPAN STYLE="text-decoration:underline;"><SPAN>https://creativecommons.org/licenses/by/4.0/legalcode</SPAN></SPAN></A></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>Under the CC-BY Licence, users must acknowledge the source of the Information in their product or application.</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><SPAN>Please use this specific attribution statement: "</SPAN></SPAN><SPAN STYLE="font-weight:bold;"><SPAN>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></SPAN><SPAN><SPAN>".</SPAN></SPAN></P><P STYLE="margin:0 0 14 0;"><SPAN><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></SPAN></P></DIV></DIV></DIV> |
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catalogPath:
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title:
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IE_GSI_MI_Marine_Download_Seabed_Survey_Leg_Data_IE_Waters_WGS84 |
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type:
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Map Service |
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url:
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tags:
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["INFOMAR","Elevation","Ireland","IE/GSI","Download","Data","marine","Bathymetry","Backscatter","Sub-Bottom Profile","Irish Waters","Marine","Seabed","Survey","XYZ","ESRI GRID","GEOTIFF","SEGY","PDF","Report"] |
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culture:
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en-IE |
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name:
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IE_GSI_MI_Marine_Download_Seabed_Survey_Leg_Data_IE_Waters_WGS84 |
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guid:
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B9633E85-5A0D-4300-87EB-88E3D51EA6CB |
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minScale:
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0 |
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spatialReference:
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GCS_WGS_1984 |