Identification

Title

DPLUS026 British Virgin Islands Seabed Classification Map

Alternative title(s)

Darwin BVI mapping

Abstract

Predicted seabed classification map for part of Sir Francis Drake Channel south of Tortola, British Virgin Islands.

Resource type

dataset

Resource locator

https://data.cefas.co.uk/view/18174

name: Cefas Data Portal

description: The Cefas Data Portal contains metadata records and data sets available to download and connect to in support of our commitment to open science. Data is available in the following formats: CSV, ESRI Shapefile. The data can also be accessed via the WFS and WMS protocols.

function: download

Unique resource identifier

code

CEFAS18174

codeSpace

https://data.cefas.co.uk

Dataset language

eng

Spatial reference system

code identifying the spatial reference system

Classification of spatial data and services

Topic category

environment

Keywords

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2011-03-25

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2008-06-01

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

revision

effective date

2010-05-18

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2012-01-11

Keyword set

keyword value

originating controlled vocabulary

title

reference date

date type

publication

effective date

2012-01-11

Geographic location

West bounding longitude

-70.00

East bounding longitude

-60.00

North bounding latitude

20.00

South bounding latitude

10.00

Temporal reference

Temporal extent

Begin position

2015-04-01

End position

2015-09-30

Dataset reference date

date type

publication

effective date

2017-02-02

date type

revision

effective date

2023-02-06

date type

creation

effective date

2016-10-20

Frequency of update

notPlanned

Quality and validity

Lineage

A new habitat map for the site was produced by analysing and interpreting the available acoustic data and the ground truth data collected by the dedicated survey of North St George's Channel rMCZ. The process is a combination of two approaches, statistical modelling and image analysis. To map substrata and assemblage types across the study site, object-based image analysis (OBIA; Blaschke, 2010) was utilised. The technique was implemented in the software package eCognition® v8.8 combined with a predictive modelling approach using the Random Forest2 algorithm (Breiman, 2001) application within eCognition®. This consists of a classification model aimed at predicting a target variable (in this case, sediment composition) based on exhaustively sampled auxiliary variables (in this case, the acoustic data). The technique has been used in previous studies to predict sediment type (Li et al., 2011a). Li et al. (2011b) showed that the Random Forest algorithm outperformed a range of other modelling techniques for predicting substrate type (Liaw and Wiener, 2002).

Conformity

Conformity report

specification

title

reference date

date type

publication

effective date

2013-12-10

degree

false

explanation

See the referenced specification

Conformity report

specification

title

reference date

date type

publication

effective date

2010-12-08

degree

true

explanation

See the referenced specification

Data format

name of format

Unknown

version of format

Constraints related to access and use

Constraint set

Limitations on public access

Constraint set

Limitations on public access

Responsible organisations

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

originator

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

custodian

Responsible party

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

distributor

Responsible party

organisation name

Department for Environment, Food and Rural Affairs (DEFRA)

email address

defra.helpline@defra.gov.uk

responsible party role

owner

Metadata on metadata

Metadata point of contact

organisation name

Centre for Environment, Fisheries and Aquaculture Science, Lowestoft Laboratory (CEFAS)

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

email address

data.manager@cefas.co.uk

responsible party role

pointOfContact

Metadata date

2023-02-06T12:21:44

Metadata language