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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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 | Irish autumns are characterized by an increase in mean rainfall, with an abundance of cloudy days and rare sunny moments | | Mean November Rainfall (1981 - 2010) | | | Autumn is the season of highest rainfall levels in Ireland, with a mean rainfall of over 200mm. The precipitation levels can vary between different regions, and can often increase in the east by 100mm and in the west by as much as 300mm. The record rainfall level in a single month occurred in October 1996, with a rainfall level of 790mm in Cummeragh, Co. Kerry. |
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| Irish autumns are characterized by an increase in mean rainfall, with an abundance of cloudy days and rare sunny moments | | Mean October Rainfall (1981 - 2010) | | | Autumn is the season of highest rainfall levels in Ireland, with a mean rainfall of over 200mm. The precipitation levels can vary between different regions, and can often increase in the east by 100mm and in the west by as much as 300mm. The record rainfall level in a single month occurred in October 1996, with a rainfall level of 790mm in Cummeragh, Co. Kerry. |
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| Irish autumns are characterized by an increase in mean rainfall, with an abundance of cloudy days and rare sunny moments | | Mean September Rainfall (1981 - 2010) | | | Autumn is the season of highest rainfall levels in Ireland, with a mean rainfall of over 200mm. The precipitation levels can vary between different regions, and can often increase in the east by 100mm and in the west by as much as 300mm. The record rainfall level in a single month occurred in October 1996, with a rainfall level of 790mm in Cummeragh, Co. Kerry. |
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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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