c0d4c02f-4617-4636-94ef-8ea129094b52 English HELCOM Secretariat data@helcom.fi 2026-10-09T15:41:05 EPSG:3035 HELCOM Subbasins with coastal WFD water types or water bodies (level 4) 2022-02-21 https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/c0d4c02f-4617-4636-94ef-8ea129094b52 This dataset includes assessment units in scale 4, HELCOM Subbasins with coastal WFD water types or water bodies (Division of the Baltic Sea into 17 sub-basins and further division into coastal and off-shore areas and division of the coastal areas by WFD water types or water bodies) as defined in the HELCOM Monitoring and assessment strategy (https://helcom.fi/publications/monitoring-and-assessment-strategy/) The marine area of the Baltic Sea is sub-divided for regional monitoring and assessment purposes. The scale of sub-division to be chosen may differ depending on purpose, e.g. monitoring and assessment of mobile marine mammals may require the whole Baltic Sea scale while assessment of eutrophication may require the scale of open sea combined with water body or -type in the coastal waters. The scale to be used should be chosen among the four HELCOM scales and jointly agreed. Other sub-divisions, for example aggregations of units, can be agreed and used provided they use the agreed boundaries and remain within the boundaries and use the nomenclature of the described hierarchical system. HELCOM Secretariat data@helcom.fi Bio-geographical regions GEMET - INSPIRE themes, version 1.0 2008-06-01 geonetwork.thesaurus.external.theme.httpinspireeceuropaeutheme-theme GEMET 2018-08-16 geonetwork.thesaurus.external.theme.gemet-en MADS Ocean Boundaries Use constraints: Data can be used freely given that the source (HELCOM) is cited. Access constraints: No limitations on public access. English environment 7.5265 33.7966 52.5359 66.4241 2022-02-21 ESRI Shapefile 1.0 https://maps.helcom.fi/website/MADS/download/?id=c0d4c02f-4617-4636-94ef-8ea129094b52 WWW:LINK-1.0-http--link Download dataset https://maps.helcom.fi/website/mapservice/?datasetID=c0d4c02f-4617-4636-94ef-8ea129094b52 WWW:LINK-1.0-http--link Open in Map Viewer Commission Regulation (EU) No 1089/2010 of 23 November 2010 implementing Directive 2007/2/EC of the European Parliament and of the Council as regards interoperability of spatial data sets and services 2010-12-08 Dataset has been prepared based on polygons of HELCOM open sea basins and merged to WFD water types and water bodies as submitted by HELCOM contracting parties. Data set was modified by request in September 2013 by dividing assessment GER-011 to two areas GER-011 and GER-111". The dataset was corrected in 11 September 2017 regarding Sound-Arkona and Kattegat-Great belt border. This dataset was updated in September 2017 following the update of http://www.helcom.fi/Documents/Action%20areas/Monitoring%20and%20assessment/Monitoring%20and%20assessment%20strategy/Monitoring%20and%20assessment%20strategy.pdf as agreed in https://portal.helcom.fi/meetings/STATE - CONSERVATION 6-2017-412/MeetingDocuments/Outcome of State and Conservation 6-2017.pdf. Islands under 1 ha have been removed from the dataset and polygon shape have been simplified with bend simplify tool with 100m maximum allowable offset in September 2017. The dataset was updated again in 2022 with changes collected for HELCOM assessment units to be applied in HOLAS III, presented on State and Conservation 15-2021, document 3J-94: https://portal.helcom.fi/meetings/STATE%20-%20CONSERVATION%2015-2021-843/MeetingDocuments/3J-94-Rev.2%20Summary%20of%20HELCOM%20assessment%20unit%20changes%20for%20HOLAS%20III.pdf Furthermore, the dataset was updated in 2022 to also incorporate the splitting of Bornholm Basin (SEA-007) into two assessment units with the separation of the Pomeranian Bay and the redefinition of the boundaries for the Gulf of Finland (SEA-013) applied only for the eutrophication assessment, as presented in State and Conservation 14-2021 (outcome at: https://portal.helcom.fi/meetings/STATE%20-%20CONSERVATION%2014-2021-824/MeetingDocuments/Outcome%20of%20STATE%20AND%20CONSERVATION%2014-2021.pdf). In august 2022 the dataset was updated to incorporate changes on the Danish coast, resulting in changes in the areas of Kiel Bay and the Great Belt. In October 2026 the dataset was updated to incorporate the new delineations of Polish coastal waters and Gulf of Gdansk. The update includes also changes regarding the codes and names of water bodies and water types for Denmark, Estonia, Germany and Sweden.