Identification

Title

2017 - 2017 Centre for Environment, Fisheries & Aquaculture Science (Cefas) Videos and still images of the seabed from the 2017 survey of Grenada and the Grenadines Islands in the Caribbean

Abstract

As part of the Commonwealth Marine Economies Programme (CMEP) Cefas collected 87 drop camera video tows of the seabed on the southern and western sides of the island of Grenada and around the Carriacou and the Grenadines Islands. These videos of the seabed were to characterise the benthic fauna within the area and support the creation of benthic habitat maps from UKHO lidar data. The videos and still images were acquired during the 2017 survey using a lightweight drop camera frame with two GoPros simultaneously collecting stills and video data. Two lasers were fitted for scaling images and additional lighting provided real colour images of the seabed. The drop camera frame was lowered to the seabed by hand from a vessel, with the video monitored to maintain a consistent height above the seabed. Tows were 15 minutes long with the vessel drifting in neutral so the distance covered in each tow varied. Sample depths ranged from 3-40 m and covered a range of habitats including bare sediment, seagrass, and coral and sponge dominated reefs. Still images were acquired every minute at a point when the seabed was clearly in focus.

Resource type

dataset

Resource locator

Unique resource identifier

code

CEFASa96617a7-06ad-4706-a0ab-cc31f89f9b0a

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::4030

Classification of spatial data and services

Topic category

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

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

effective date

code identifying the extent

Temporal reference

Temporal extent

Begin position

2017-08-09

End position

2017-10-17

Dataset reference date

date type

publication

effective date

2021-09-08

Frequency of update

notPlanned

Quality and validity

Lineage

This data holding contains the raw drop camera videos and still images for all the stations collected during this 2017 survey. High-definition video were subsequently overlaid with station information, GPS and time. Still images also contain no overlaid metadata as the GPS positions and extracted information are stored in the Proforma document.

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

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

2021-09-08T12:15:37

Metadata language