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
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Alternate title | csandRog10 |
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Date | 2015-12-31T00:00:00 |
Date type | Publication: Date identifies when the resource was issued |
Purpose | Research |
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Status | Completed: Production of the data has been completed |
Point of contact
Individual name | Eli Rinde |
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Organisation name | NIVA |
Electronic mail address | eli.rinde@niva.no |
Role | Owner: Party that owns the resource |
Maintenance and update frequency | As needed: Data is updated as deemed necessary |
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Descriptive keywords
GEMET - INSPIRE themes, version 1.0 | |
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GDI-Vlaanderen Trefwoorden | Metadata GDI-Vl-conform |
Other keywords | Marine habitat mapping |
Spatial representation type | Vector: Vector data is used to represent geographic data |
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Spatial resolution
Denominator | 50000 |
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Character set | UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 |
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Topic category code |
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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 Information
Unique resource identifier | EPSG:3857 |
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Distribution format | Web Map Service (Version: 1.0.0) | ||||||||||
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File identifier | 992439f3-45d0-4259-b9b8-d9ea107b3b19 | ||||||||
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Character set | UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646 | ||||||||
Date stamp | 2022-04-28T16:34:34.837Z | ||||||||
Metadata standard name | ISO 19115:2003/19139 | ||||||||
Metadata standard version | 1.0 | ||||||||
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