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

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

Vertical extent

Minimum value: -1000

Maximum value: 0

Supplemental Information: Rinde E, Rygg B, Bekkby T, Is├ªus 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

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