Data and map services

HELCOM spatial datasets can be access from HELCOM Map and Data service. The data is grouped to following map services, which contain several map layters: 

Status assessments: Assessment status maps and results derived from monitoring data

Sea Environmental monitoring: Monitoring stations and assessment units

Pressures and Human Activities: Datasets related to pressures (pollution and sources) to the Baltic Sea

Biodiversity: Biodiversity related datasets such as species distribution and protected areas.

Maritime & Response: Datasets related to maritime traffic and accident response

Background: Background datasets such as drainage basin, territorial waters etc.

Each dataset is accompanied by a metadata file which describes the dataset. Users are advised to familiarise themselves with the metadata in order to better understand the quality, nature and restrictions of the data.


Figure 1. Key functionalities of the map service Layer list. Click here to view the full user manual


HELCOM provides direct access to all HELCOM geospatial datasets either by ArcGIS rest interface or INSPIRE compliant OGC WMS Standard:

ArcGIS Rest interface address:

OGC WMS (1.3.0) interface addresses:

Status assessments:

Sea Environmental monitoring:

Pressures and Human Activities:


Maritime & Response:


HELCOM WMS service is currently created with ArcGIS Server 10.4 and enabled for multiple spatial reference systems in order to provide data within national coordinate systems used by national web map portals. The coordinate systems currently provided are:

  • EPSG: 3035 (ETRS89LAEA, INSPIRE/EU recommended frame of reference for geodata for Europe.)

  • EPSG: 4386 (WGS84)

  • EPSG: 32633 (WGS 84 / UTM zone 33N)

  • EPSG: 3857 (WGS84 Web Mercator)

  • EPSG: 3006 (SWEREF99TM)

  • EPSG: 3067 (ETRS89 / ETRS-TM35FIN)

The following web map portals are currently displaying map data from HELCOM via WMS connection:

EMODnet biology

Swedish Water information system (VISS, available only in swedish)

The Swedish Agency for Marine and Water Management (Havsplanering, available only in swedish)

Finnish national geospatial portal (Paikkatietoikkuna, available only in finnish)




Map service


​HELCOM MPAs updated 



Map service interface addresses changed



​Harbour porpoise sighting  updated 



​​HELCOM hotspots layer updated according to HOD 51-2016 decisio​n (hotspot 27 removed from the list)

​Pressures and Human Activities


Pharmaceutical datasets produced for BSEP149 published in Land-based-pollution --> Pharmaceuticals

​Pressures and Human Activities


​Monitoring stations updated with new data on pointwise locations of hazardous substances sampling points

​Sea Environmental monitoring


​Response vessels updated 

​Maritime & Response


​HELCOM MPAs attribute table updated 



Illegal oil discharges and Other discharges updated with 2015 data

​Maritime & Response


​Ramsar sites updated 



​Fisheries VMS datasets (intensity) for the years 2009-2013 corrected 

​Pressures and Human Activities


​HELCOM hotspots layer updated according to HOD 49-2015 decision (6 hotspot removed from the list)

​Pressures and Human Activities


​Fisheries VMS data (effort and intensity) for the years 2009-2013 added

​Pressures and Human Activities


​Dredging and depositing sites updated with 2014 data. 

​Pressures and Human Activities


Land-based pollution map service renamed to Pressures and Human Activities

​Pressures and Human Activities


​MORE monitoring stations updated with new station as provided countries (see metadata of each layer)

​Sea Environmental monitoring


​Illegal Discharges data for the year 2014 added

Added new data layer "Other Discharges"

Maritime & Response


​MORE monitoring stations updated with new station as provided by countries (see metadata of each layer)

​Sea Environmental monitoring


​HELCOM MPAs layer updated (11 new areas)



HELCOM hotspots layer updated according to HOD 47-2014 decision (hotspot 18.1 removed from the list)

​Pressures and Human Activities


​​Eutrophication status, confidence and distance to target indicator maps added

​Sea Environmental status​ 


​Biodiversity map service launched with new Red list datasets (205 new datasets available)



​Shipping accidents data for the year 2013 added

Maritime & Response


​Monitoring map service updated and download functionality completed

Sea Environmental monitoring​ 


​Nitrogen and phosphorus inputs per subbasin and country (2010) added

Pressures and Human Activities


​All map service user interfaces updated with new dataset groupings




The development of the HELCOM map and data service has been supported by:

​EU Strategy for the Baltic Sea Regions (EUSBSR)

Nordic council of ministers

​The Nordic Council of Ministers funded project: Development of HELCOM Data and Geographic Information System


​EU funded HELCOM SCALE project (Project 21.0401/2007/485831/SUB/D2).

EU Framework contract "Development of a shared data and information system between the EU and the regional sea conventions"