Identification

Title

2016 - 2017 Centre for Environment, Fisheries & Aquaculture Science (Cefas) DPLUS0045 Anguilla Satellite Derived Bathymetry 2m

Abstract

Satellite derived bathymetry data created as part of the Darwin Plus funded project "Mapping Anguilla’s ‘Blue Belt’ Ecosystem Services". The project develops local capacity to undertake comprehensive marine resource assessments of Anguilla’s ‘Blue-Belt’, delivering best practice guidance for combining satellite and acoustic surveys, to extend mapping into deeper waters for the first time.

Resource type

dataset

Resource locator

http://data.cefas.co.uk/#/View/19315/

function: order

Unique resource identifier

code

CEFAS9fbfca53-d56b-4d91-8da7-a2914e9f591a

codeSpace

http://www.cefas.co.uk/

Dataset language

eng

Spatial reference system

authority code

OGP

code identifying the spatial reference system

urn:ogc:def:crs:EPSG::32620

Classification of spatial data and services

Topic category

inlandWaters

Keywords

Keyword set

keyword value

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

Geographic location

West bounding longitude

-70

East bounding longitude

-60

North bounding latitude

20

South bounding latitude

10

Extent

Extent group

authority code

title

reference date

date type

revision

effective date

2010-05-18

code identifying the extent

Temporal reference

Temporal extent

Begin position

2016-09-04T23:00:00.000Z

End position

2017-01-31T00:00:00.000Z

Dataset reference date

date type

publication

effective date

2018-05-17

Frequency of update

notPlanned

Quality and validity

Lineage

Satellite derived bathymetry (SDB) works by creating a relative depth map from the difference in the attenuation of blue and green wavelength light through water. As green light attenuates faster than blue the ratio between the two is used to calculate the relative depth. The relative depths are then tied to real depths (from the MBES survey) to create a bathymetry map. Data from the Pleiades 1A sensor was purchased for Anguilla at a resolution of 2m by 2 m. The pre-processing and processing of the data was undertaken by Environment Systems and Newcastle University. After the data had been standardised the bathymetry was derived using a method developed by Stumpf* et al.* (2003) [1] utilising the ratio between the differences in the attenuation of green and blue light. The map was then depth corrected to points taken from the MBES data collected as part of this project and from point depth samples collected around the island during a separate survey. [1] Stumpf, R.P., Holderied, K. and Sinclair, M. (2003) 'Determination of water depth with high-resolution satellite imagery over variable bottom types', Limnology and Oceanography, 48(1; NUMB 2), pp. 547-556.

Conformity

Data format

name of format

version of format

Constraints related to access and use

Constraint set

Use constraints

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Constraint set

Limitations on public access

Public data (Crown Copyright) - Open Government Licence Terms and Conditions apply

Responsible organisations

Responsible party

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

originator

Responsible party

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

custodian

Metadata on metadata

Metadata point of contact

contact position

Data Manager

organisation name

Centre for Environment, Fisheries & Aquaculture Science

full postal address

Cefas Lowestoft Laboratory

Pakefield Road

Lowestoft

NR33 0HT

UK

telephone number

+44 (0)1502 562244

email address

data.manager@cefas.co.uk

responsible party role

pointOfContact

Metadata date

2020-01-09T15:01:42

Metadata language