EMODnet product catalogue
Carbonate sand deposit model in Nordland
ÔÇó Model run in UTM zone 33N
ÔÇó The model was run in 2014 by NIVA
ÔÇó Data collected 2011-2013 by NGU, NIVA included absences from kelp surveys
ÔÇó The data were collected in Nordland county, but the models covers also a small part of Troms in the North and Tr├©ndelag in the south.
ÔÇó 1078 datapoints, but only data down to 100 m depth and with more than 50 % carbonate content were included, resulting in 473 presences.
ÔÇó Modelled using Maxent on presence data, validated with 139 presences and 740 absences (the validation points are spatially biased towards areas shallower than 40 m depth)
ÔÇó Modelled the probability of finding carbonate sand with more that 50 % carbonate content (carbonate contact below 50 % is absence together with rocky seabed and other non-carbonate sand areas)
ÔÇó Input variables: depth, slope, curvature (with both 250, 500 and 1000 m calculation window), wave exposure, maximum current speed and mean current speed
ÔÇó Depth, slope, curvature and wave exposure had spatial resolution of 25 m, models developed by NIVA. The current speed had 200 m spatial resolution (developed from NorKyst800).
ÔÇó Cut-off value for identifying polygon presences: 0.31
 spatial (horizontal) distribution is.
ÔÇó AUC=0.88 using independent validation presences and absences
Simple
- Date (Publication)
- 2014-12-31T16:43:00
- Presentation form
- Digital map
- Purpose
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Research
- Status
- Completed
- Point of contact
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Organisation name Individual name Electronic mail address Role NIVA
Trine Bekkby
Owner
- Maintenance and update frequency
- As needed
- Theme
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Marine habitat mapping
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GEMET - INSPIRE themes, version 1.0
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-
Habitats and biotopes
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- Use limitation
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No defined limitation
- Access constraints
- Other restrictions
- Other constraints
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View only - please contact data owner for access to full data
- Spatial representation type
- Vector
- Denominator
- 50000
- Language
-
eng
- Character set
- UTF8
- Topic category
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- Environment
- Begin date
- 2011-01-01T16:47:00
- End date
- 2013-12-31T23:00:00
))
Vertical extent
- Minimum value
- -1000
- Maximum value
- 0
- Reference system identifier
- EPSG:3857
- Distribution format
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Name Version Web Map Service
1.0.0
- OnLine resource
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Protocol Linkage Name OGC:WMS
https://ows.emodnet-seabedhabitats.eu/geoserver/emodnet_view_maplibrary/wms? Carb_sand_nordland
Metadata
- File identifier
- 35a4ff43-b7b3-4587-9829-486c32b69a40 XML
- Metadata language
-
eng
- Character set
- UTF8
- Date stamp
- 2022-04-28T16:17:52.786Z
- Metadata standard name
-
ISO 19115:2003/19139
- Metadata standard version
-
1.0
- Metadata author
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Organisation name Individual name Electronic mail address Role NIVA
Trine Bekkby
Point of contact
)))
