Data & Maps

Link to INFOMAR Web mapping viewer
Marine Datasets

View and explore marine data using the INFOMAR Data Viewer.

 

To access Marine web mapping viewers, web mapping services and metadata please visit the dedicated page.

Detailed information on marine datasets, data download formats and software for viewing the data can be found below.

Backscatter

Bathymetry (Shaded Relief)

Geology

Gravity

Lidar

Magnetics

Maps

Seabed Habitats & Substrate

Seabed Samples

Shipwrecks

Survey Coverage and Reports

Backscatter

 
A Multibeam Echosounder (MBES) also measures the strength of the sound returning from the seabed, known as backscatter.
 
Each seabed type (mud, sand, gravel, rock) is given a backscatter value, depending on the strength of the sound returned to the sonar head. 
 
Rocky areas have high returns. Soft sediments like sand absorb energy and have low backscatter returns.
 
These values are used to make a grey-scale image with a dark colour for high returns (rocks) and a bright colour for low returns (sand). 

 
Backscatter data formats.

FormatSoftwareInstructionsImage
PDF Chart Free Adobe Download Charts
Download pdf 
Select: Offshore Charts pdf
Geotiff (.tif) Any image viewing software Download Geotiffs
Select: Offshore Geotiffs-Offshore Geotiffs-Backscatter GeoTiffs
Trackline xyz (.dat)Fledermaus
ArcGIS
QGIS
Download xyz
Select: Vector datasets-Offshore -Backscatter 
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Bathymetry (Shaded Relief)

Bathymetry (Water Depth / Underwater terrain).
We use a Multibeam Echosounder (MBES) on a boat to determine water depth. The depth is calculated based on the time it takes the sound to be emitted from the sensor, hit the seabed and bounce back.

 
The water depth maps are known as "Bathymetry Maps".

 
We use software called Fledermaus to get the 3D effect. 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. 

 
These are known as "Shaded Relief Bathymetry Maps".

Bathymetry data formats.

FormatSoftwareInstructionsImage
PDF Chart Free Adobe Download Charts
Download pdf 
Select: Offshore Charts pdf
Google (.kmz) Free Google Earth Download kmz
Select: Google Kmz 
Fledermaus .scene, .sdFree iView4D Download .scene
Select: Fledermaus Scenes
Note: You can click and get depth using this software.
Geotiff (.tif) Any image viewing software Download Geotiffs
Select: Offshore Geotiffs-Offshore Geotiffs-Bathymetry GeoTiffs
Grid ER Mapper(.ers)ERDAS ER Mapper
ArcGIS
QGIS
Download .ers
Select:Select: Gridded datasets-Offshore-Bathymetry
ESRI ArcGIS GRIDArcGIS Download ArcGIS GRID
Select:  ArcGIS GRIDS-Offshore ArcGIS-Bathymetry Survey Leg ArcGIS GRID or Bathymetry Merged Survey ArcGIS GRID or Bathymetry Entire Area ArcGIS GRID.
Grid or trackline xyz(.dat)Fledermaus,
ArcGIS
QGIS
Download xyz
Select: Vector datasets-Offshore -Bathymetry (Survey Leg) for a grid or Bathymetry (Survey Line) for tracklines.
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Geology

 
The Onshore Geology map is the Bedrock Geology 1:1 Million scale map.

 
The Seabed geology 1:1 Million scale map was compiled for the EMODnet Geology project (lithology).
 
Geology data formats.

FormatSoftwareInstructionsImage
ShapefileFree ArcGIS Explorer
ArcGIS
QGIS
Download Offshore Shapefiles
Select: Vector datasets-Offshore-Offshore Shapefiles
infomar_emodnet_geology_wp4_pre-quaternary_seabed_geology.shp
EMODnet Geology Download
Sea-floor (bedrock) lithology
ShapefileFree ArcGIS ExplorerArcGIS
QGIS
Download Onshore Shapefiles
Select: Vector datasets-Onshore-Bedrock 
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Gravity

 
Gravity is the measure of the force of attraction at any point on the Earth's surface. This force will vary depending on the rock type present. 

 
Gravity surveys are used to locate sedimentary basins (regions where considerable thicknesses of sediments have accumulated). These basins are key areas of interest in the search for oil and gas reserves. 

 
Gravity is measured using on-board marine gravimeters.

 
Gravity data formats.

FormatSoftwareInstructionsImage
ESRI ArcGIS GRID ArcGIS Download ArcGIS GRID
Select:  ArcGIS GRIDS-Offshore ArcGIS-
Gravity ArcGIS GRID 

 
Grid xyz (.dat) Fledermaus
Geosoft
ArcGIS
QGIS
Download xyz 
Select: Vector datasets-Offshore -Gravity 
Grid ER Mapper(.ers)
ERDAS ER Mapper
ArcGIS
QGIS
Geosoft
Free Oasis montaj Viewer

Select:Select: Gridded datasets-Offshore-Gravity 



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Lidar

This method of surveying emits two laser light beams 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. 

 
Digital photographs can also be taken using a downward looking geo-referenced digital camera.

 
We use software called Fledermaus to get the 3D effect. 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/landscape. 

 
These are known as "Shaded Relief Lidar Maps".

Lidar data formats.

FormatSoftwareInstructionsImage
PDF Chart Free Adobe Download Charts
Download pdf 
Select: Offshore Charts pdf
Google (.kmz) Free Google Earth Download kmz
Select: Google Kmz 
Fledermaus .scene, .sdFree iView4D Download .scene
Select: Fledermaus Scenes
Note: You can click and get depth using this software.
Geotiff (.tif) Any image viewing software Download Geotiffs
Select: Offshore Geotiffs-Offshore Geotiffs-Lidar GeoTiffs
Grid ER Mapper(.ers)ERDAS ER Mapper
ArcGIS
QGIS
Download .ers
Select:Select: Gridded datasets-Offshore-Lidar
ESRI ArcGIS GRIDArcGIS Download ArcGIS GRID
Select:  ArcGIS GRIDS-Offshore ArcGIS-LIDAR ArcGIS GRID
Grid xyz(.dat)Fledermaus,
ArcGIS
QGIS
Download xyz
Select: Vector datasets-Offshore -Lidar 
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Magnetics

 
Many rocks have a magnetic component and this magnetic field can be measured by a magnetometer towfish. 

 
These maps are used to aid in the production of geological maps and are also commonly used during mineral exploration. 

 
Manmade objects containing iron and other metals will also produce a magnetic field, so the magnetometer can also be used to detect shipwrecks and debris on the ocean floor.

 
Magnetics data formats.

FormatSoftwareInstructionsImage
ESRI ArcGIS GRID ArcGIS Download ArcGIS GRID
Select:  ArcGIS GRIDS-Offshore ArcGIS-
Magnetics ArcGIS GRID

 
Grid xyz (.dat) Fledermaus
Geosoft
ArcGIS
QGIS
Download xyz 
Select: Vector datasets-Offshore -Magnetics 
Grid ER Mapper(.ers)
ERDAS ER Mapper
ArcGIS
QGIS
Geosoft
Free Oasis montaj Viewer

Select:Select: Gridded datasets-Offshore-Magnetics 



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Maps

Maps available for download.

FormatSoftwareInstructionsImage
Image (.jpg)

PDF Map
Any image viewing software

Free Adobe
Download 3D Maps

Download pdf 
Select: Offshore Charts pdf
Image (.jpg)

PDF Map
Any image viewing software

Free Adobe
Download Real Maps

Download pdf 
Select: Offshore Charts pdf
PDF Map


Free Adobe


Download Charts

Download pdf 
Select: Offshore Charts pdf
PDF Map



Free Adobe


Download survey coverage maps



Online Any browser View Story Maps

App

iOS
Android
Download Story Map App 
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Seabed Habitats & Substrate

 
The seabed substrate map is created by grouping seabed areas that are alike. We use the bathymetry, backscatter and seabed samples data to select these areas.

 
EMODnet Geology WP3 Seabed substrate map. This is a broadscale map (1: 250 000 scale) collected and harmonised by the EMODnet-Geology partners. It is classified using the Folk schema (7 classes). 

 
INFOMAR have produced more detailed Seabed Classification maps for some areas around the Irish coast.
 
Seabed Habitats data formats.

FormatSoftwareInstructionsImage
ShapefileFree ArcGIS Explorer
ArcGIS
QGIS
Download Offshore Shapefiles
Select: Vector datasets-Offshore-Offshore Shapefiles
infomar_emodnet_geology_wp3_seabed_substrate.shp
EMODnet Geology Download
Seabed Substrate map 1:250k & Seabed Substrate map 1:1M
ESRI ArcGIS GRIDArcGIS

Download ArcGIS GRID
Select:  ArcGIS GRIDS-Offshore ArcGIS-
Seabed Classification ArcGIS GRID
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Seabed Samples

 
We collect sediment samples from the seabed. 

 
Looking at the samples along with the bathymetry and backscatter maps allows us to group seabed areas of similar nature, and create seabed habitat maps.

 
Seabed Sample data formats.

FormatSoftwareInstructionsImage
ShapefileFree ArcGIS Explorer
ArcGIS
QGIS
Download Offshore Shapefiles
Select: Vector datasets-Offshore-Offshore Shapefiles
Samples_PSA.shp,Seabed_Samples.shp,Non_INFOMAR_Samples.shp

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Shipwrecks

 
We map shipwrecks 

 
Shipwreck data formats.

FormatSoftwareInstructionsImage
ShapefileFree ArcGIS Explorer
ArcGIS
QGIS
Download Offshore Shapefiles
Select: Vector datasets-Offshore-Offshore Shapefiles
Shipwrecks.shp

Google (.kmz) Free Google Earth Download kmz - webpage
Download kmz - data download site
Select: Google Kmz 

PDF Information SheetFree Adobe
Download pdf 

OnlineAny browser
View 3D Models


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Survey Coverage & Reports

 
Download the Survey Coverage polygons & tracklines.

 
You can also download the Survey Leg Reports.

FormatSoftwareInstructionsImage
PDF Map



Free Adobe


Download survey coverage maps



ShapefileFree ArcGIS Explorer
ArcGIS
QGIS
Download Offshore Shapefiles
Select: Vector datasets-Offshore-Offshore Shapefiles
Survey_Coverage.shp,Lidar_Coverage.shp,
Non_INFOMAR_Coverage.shp,PAD_Coverage.shp

ShapefileFree ArcGIS Explorer
ArcGIS
QGIS
Download Offshore Shapefiles
Select: Vector datasets-Offshore-Offshore Shapefiles
eg TRACKLINES_2000.shp

PDF, .doc,.xlsFree Adobe
Word
Excel
Download Reports
Select: Reports


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