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Click on the Add Layer button to select from a long list of coastal and marine layers to view in the map. Select a layer name to see information about a layer, including metadata and downloadable GIS data if available.
Explore the other tabs for more options.
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 | Even seemingly strong sections of coastline, such as these cliffs on the Dingle Peninsula, are prone to erosion. | | Coastline | | | The coastline of Ireland is a complex environment where land meets sea. Its shape changes over time, influenced by currents, weather, erosion, and human impacts to name a few. |
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 | Sea dunes located 20 nautical miles off the south coast of Co. Wexford are one example of seabed features. | | Bathymetry of Irish Waters: GEBCO Contours | | | The bathymetry around Ireland is diverse, with smooth, shallow sea floor close to the coast, and steep slopes of the continental margin further to the south and west. |
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 | Among details displayed in the OSI / OSNI 1:50,000 Webmap Series are names of channels, such as Bull's Mouth in Blacksod Bay, Co. Mayo. | | Ordnance Survey Basemaps | | | Ordnance Survey of Ireland and Northern Ireland provide base information such as towns, roads, counties and rivers for the Republic and Northern Ireland. In MIDA, the 1:450,000 scale basemap changes to the more detailed 1:50,000 scale basemap as you zoom in to coastal areas. |
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 | A ferry from Swansea arrives in the Port of Cork. | | International Ferry Ports | | | A number of ferry operators provide connections for vehicles and passengers to Great Britain and mainland Europe from Irish ferry ports. All of these ports are located either on the East or South coasts. Sometimes ferry crossings are disrupted by bad weather. |
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 | A ferry from Glenbrook (Pasage West) crosses the river Lee to Carrigaloe (Cobh) , Co. Cork. | | Local Ferry Ports | | | A number of ferry services provide transport links to offshore islands and act as connecting services across rivers and estuaries. For many island communities they offer the only means of connection to the mainland. |
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 | The port of Cork is the third largest port in the Republic of Ireland. | | Commercial Ports | | | As an island, commercial ports are vital to the economy as they provide a gateway to the rest of the world. Almost all of the goods exported and imported are transported by ship. |
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