HELCOM Metadata catalogue
Zostera marina distribution
Distribution of eelgrass based on data submission by HELCOM contracting parties. Mainly pointwise occurrences of eelgrass were submitted, originally gathered in national mapping and monitoring campaigns, or for scientific research. Polygon data from Puck Bay (Poland) was digitized based on Polish Marine Atlas and Orlowo cliff area was added based on expert knowledge. From Estonian waters, a predictive model was used (200m resolution), that was converted to presence/absence using minimized difference threshold (MDT) criteria. All data (points, polygon and the raster presenting predicted presence of eelgrass in the Estonian waters) were generalized to 5km x 5km grid cells.
Simple
- Date (Creation)
- 2018-01-15
- Unique resource identifier
- https://metadata.helcom.fi/geonetwork/srv/eng/catalog.search#/metadata/ca327bb1-d3cb-46c2-8316-f5f62f889090
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GEMET - INSPIRE themes, version 1.0
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Habitats and biotopes
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Species distribution
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GEMET
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marine ecology
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- Keywords
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MADS
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HOLAS2
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ecosystem component
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- Use constraints
- Other restrictions
- Other constraints
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Use constraints: Data can be used freely given that the source is cited as "HELCOM HOLAS II Dataset: Zostera marina distribution (2018)".
- Access constraints
- Other restrictions
- Other constraints
- Access constraints: No limitations on public access.
- Spatial representation type
- Grid
- Metadata language
- English
- Topic category
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- Environment
- Biota
))
- Begin date
- 1995-01-01
- End date
- 2016-12-31
- Unique resource identifier
- EPSG:3035
- Distribution format
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TIFF
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TIFF
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- OnLine resource
- Download dataset ( WWW:LINK-1.0-http--link )
- OnLine resource
- Open in Map Viewer ( WWW:LINK-1.0-http--link )
- Hierarchy level
- Dataset
Conformance result
- Date (Publication)
- 2010-12-08
- Statement
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Data source:
Denmark: Point data from national monitoring along transects (dive and video), data from 2007-2015. Data is available through Miljøportalen
Estonia:
Finland: Point data gathered during the national marine mapping programme VELMU (2004-2015) and inventories from Åland Islands.
Germany: Point data originally collated for monitoring and research purposes (video, photos, dive, wading, snorkeling), data from 2010-2015.
Latvia: No reported occurrences of eelgrass.
Lithuania: No reported occurrences of eelgrass.
Poland: Polygon data digitized based on Polish Marine Atlas http://www.iopan.gda.pl/hm/atlas/Atlas_all.pdf . Expert consultation.
Russia: Data used in the previous HELCOM RED LIST assessment have been used for Russian marine areas.
Sweden: Point data from national monitoring and mapping surveys (1995 -2015) extracted from SMHI SHARK database.
2018 updates: Updated data from Sweden and Finland and new data from Russia were included.
Data quality:
Mapping is not exhaustive and sampling density varies between the countries.
Attribute information: Raster value representing presence (1) or absence (0) of <i>Zostera marina</i>.
Spatial resolution: 1 km x 1 km grid (originally 5 x 5 km).
- File identifier
- ca327bb1-d3cb-46c2-8316-f5f62f889090 XML
- Metadata language
- English
- Character set
- UTF8
- Hierarchy level
- Dataset
- Date stamp
- 2023-11-10T14:27:46
Overviews
Spatial extent
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