BRT carbonate sand model Rogaland, 2015

Region: the county Rogaland

Number of field observations: 633

Field sampling year: 1992, 1993, 2012

Prevalence: 43 and 22 for 50% and 85% calcium carbonate content respectively

Presence / absences: 275/358 and 142/491 for 50% and 85% calcium carbonate content respectively

Method: BRT run with the R-package Dismo. The grid is made up by a combination of three BRT models; two simplified models including 12 and 13 predictors for carbonate sand with 50% calcium content) and one BRT model based on 10 predictor variables for carbonate sand with 85% calcium content; all run with tree complexity equal to 5. The grid constitutes the maximum predicted probability values among these three models, which all are ÔÇ£smoothedÔÇØ by applying a neighborhood analysis (i.e. mean of 3x3 neighbor cells) in advance of combining the models).

Number of predictor variables: 10-13

Information about the predictor variables: depth, curvature at detailed, medium and coarse resolution (i.e. applying a 100, 500 and 1500 m moving calculating window respectively, based on the 25 m resolution DEM), wave exposure, slope of wave exposure, and optimal radiation index, all with 25 m resolution; minimum and average seafloor temperature, average seafloor salinity, minimum and average seafloor current speed, and slope of average seafloor current speed, the latter predictors from a hydrodynamic model with 800 m spatial resolution.

AUC internal: 0.98

Simple

Alternate title

csandRog10
Date (Publication)
2015-12-31T00:00:00
Presentation form
Digital map
Purpose

Research
Status
Completed
Point of contact
Organisation name Individual name Electronic mail address Role

NIVA

Eli Rinde

eli.rinde@niva.no

Owner
Maintenance and update frequency
As needed
Theme

  • Marine habitat mapping

GEMET - INSPIRE themes, version 1.0

  • Habitats and biotopes
Use limitation

No defined limitation
Access constraints
Other restrictions
Other constraints

View only - please contact data owner for access to full data
Spatial representation type
Vector
Denominator
50000
Language

eng
Character set
UTF8
Topic category
  • Environment
Begin date
1992-01-01T00:00:00
End date
2012-12-31T00:00:00
N
S
E
W
thumbnail




Vertical extent

Minimum value
-1000
Maximum value
0
Supplemental Information

Rinde E, Rygg B, Bekkby T, Isæus M, Erikstad L, Sloreid S-E, Longva O (2006) Documentation of marine nature type models included in Directorate of Nature Management's database Naturbase. First generation models for the municipalities mapping of marine biodiversity 2007, NIVA Report LNR 5321-2006 (In Norwegian with English abstract.)

Reference system identifier
EPSG:3857
Distribution format
Name Version

Web Map Service

1.0.0
OnLine resource
Protocol Linkage Name

OGC:WMS

 		https://ows.emodnet-seabedhabitats.eu/geoserver/emodnet_view_maplibrary/wms?

csandrog10

Metadata

File identifier
992439f3-45d0-4259-b9b8-d9ea107b3b19 XML
Metadata language

eng
Character set
UTF8
Date stamp
2022-04-28T16:34:34.837Z
Metadata standard name

ISO 19115:2003/19139
Metadata standard version

1.0
Metadata author
Organisation name Individual name Electronic mail address Role

NIVA

Eli Rinde

eli.rinde@niva.no

Point of contact
 
 

Overviews

Spatial extent

thumbnail

Keywords

Marine habitat mapping
GEMET - INSPIRE themes, version 1.0

Habitats and biotopes


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