Data and map services


Sea environmental monitoring

​Sea environmental status

Pressures and Human Activities


Maritime & Response

Maritime Spatial Planning


ABOUT THE DATA and map services

HELCOM Datasets can be access from HELCOM Data and Map service as well as following thematic map portals:

Sea Environmental monitoring: Monitoring stations and assessment units

Sea Environmental status: Assessment status maps and results derived from monitoring data

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

Maritime Spatial Planning: Datasets with relevance to MSP purposes

All available map data is accessible from all thematic map services for overlaying purposes. 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.

According to the HELCOM data and information strategy , all HELCOM monitoring data should be openly accessible online. The map service contains also datasets from sources other than HELCOM, so please consult metadata of each map layer regarding use limitations. All HELCOM datasets can be used freely given that the source is cited.

The HELCOM data and information strategy is a part of the 2013 Monitoring and assessment strategy.


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:

Sea Environmental monitoring:

Sea Environmental status:

Pressures and Human Activities:


Maritime & Response:

Maritime Spatial Planning:


HELCOM WMS service is currently created with ArcGIS Server 10.1 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


Harbour porpoise sighting  updated  Biodiversity2017-01-23
​​HELCOM hotspots layer updated according to HOD 51-2016 decisio​n (hotspot 27 removed from the list)Pressures and Human Activities2017-01-18
Pharmaceutical datasets produced for BSEP149 published in Land-based-pollution --> Pharmaceuticals
Pressures and Human Activities2016-09-27
Monitoring stations updated with new data on pointwise locations of hazardous substances sampling points
Sea Environmental monitoring2016-09-16
Response vessels updated  Maritime & Response2016-09-05
HELCOM MPAs attribute table updated  Biodiversity

Illegal oil discharges and Other discharges updated with 2015 data

Maritime & Response2016-04-12
Ramsar sites updated 
Fisheries VMS datasets (intensity) for the years 2009-2013 corrected Pressures and Human Activities2016-01-26
HELCOM hotspots layer updated according to HOD 49-2015 decision (6 hotspot removed from the list)Pressures and Human Activities2015-12-14
Fisheries VMS data (effort and intensity) for the years 2009-2013 addedPressures and Human Activities2015-11-26
Dredging and depositing sites updated with 2014 data. Pressures and Human Activities2015-11-26
Land-based pollution map service renamed to Pressures and Human ActivitiesPressures and Human Activities2015-10-14
MORE monitoring stations updated with new station as provided countries (see metadata of each layer)Sea Environmental monitoring2015-09-11

​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​2015-02-19
HELCOM MPAs layer updated (11 new areas)Biodiversity2015-02-13
HELCOM hotspots layer updated according to HOD 47-2014 decision (hotspot 18.1 removed from the list)
Pressures and Human Activities2015-01-27
​Eutrophication status, confidence and distance to target indicator maps addedSea Environmental status​ 2014-12-05

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


​Shipping accidents data for the year 2013 added
Maritime & Response

​MSP map service download funtionality completed

Maritime Spatial Planning


​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"