Celtic Seas Offshore habitats classified to EUNIS habitat classification. The EUNIS habitat classification is a comprehensive pan-European system to facilitate the harmonised description and collection of data across Europe through the use of criteria for habitat identification. It is hierarchical and covers all types of habitat types from natural to artificial, from terrestrial to freshwater and marine. The habitat data geographic coverage is a part of the Celtic Sea to the south of Ireland. The Celtic Seas habitats data is a collation of historical data from the 1970's, 1980's, 1990's and 2000's. The Celtic Seas offshore habitats consist of interpolated point data from the collation of historical habitat data by Aquafact Environmental Consultants as part of the Strategic Environmental Assessment of the Irish and Celtic Seas, and published in the IOSEA 4 Report. Habitat classification and extent mapping supports understanding and knowledge on the nature of the seabed. Habitat mapping translation completed by the Advanced Mapping Services data analyst within the Marine Institute (Ireland). Habitat coverage 100% for the area defined and surveyed.