Date (Creation)

2019-09-12

Date (Revision)

2019-09-12

Date (Publication)

2019-09-12

Date (released)

2019-09-12

Edition

1.0

Unique resource identifier

https://doi.org/10.5285/afba710f-dab1-4a63-867b-520177388224

Codespace

doi

Unique resource identifier

GB/NERC/BAS/PDC/01236

Codespace

https://data.bas.ac.uk/

Unique resource identifier

NE/J023051/1

Codespace

award

Unique resource identifier

NE/J020303/1

Codespace

award

Other citation details

Please cite this item as: Fremand, A., & Barnes, D. (2019). A bathymetric compilation of Ascension Island, 2000-2017 (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/afba710f-dab1-4a63-867b-520177388224

Credit

No credit.

Status

Completed

Point of contact

Organisation name	Individual name	Electronic mail address	Role
British Antarctic Survey, Natural Environment Research Council, UK Research & Innovation	Fremand, Alice		Author
British Antarctic Survey, Natural Environment Research Council, UK Research & Innovation	Barnes, David		Author
NERC EDS UK Polar Data Centre		PDCServiceDesk@bas.ac.uk	Point of contact

Maintenance and update frequency

As needed

Maintenance note

Completed

Global Change Master Directory (GCMD) Science Keywords

• EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Bathymetry
• EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Seafloor Topography
• EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography > Water Depth
• EARTH SCIENCE > Oceans > Bathymetry/Seafloor Topography

Theme

• Ascension Island

• Bathymetry

• Multibeam

Place

• Ascension Island St Helena

GEMET - INSPIRE themes, version 1.0

• Oceanographic geographical features

Access constraints

Other restrictions

Other constraints

no limitations to public access

Access constraints

Other restrictions

Other constraints

no limitations

Use constraints

License

Other constraints

Open Government Licence v3.0

Use constraints

Other restrictions

Other constraints

This data is governed by the NERC Data Policy: https://www.ukri.org/who-we-are/nerc/our-policies-and-standards/nerc-data-policy/

Use constraints

Other restrictions

Other constraints

Further by downloading this data the user acknowledges that they agree with the NERC data policy (), and the following conditions:

1. To cite the data

Fremand, A.C. (2019) and Barnes, D. A bathymetric compilation of Ascension Island, 2000-2017. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation.

2. The user recognizes the limitations of data and will not use this data for navigation purposes. Use of the data is at the users' own risk, and there is no warranty as to the quality or accuracy of any data, or the fitness of the data for your intended use. The data are not necessarily fully quality assured and cannot be expected to be free from measurement uncertainty, systematic biases, or errors of interpretation or analysis, and may include inaccuracies in error margins quoted with the data.

Use constraints

Other restrictions

Other constraints

None

Unique resource identifier

url

Codespace

url

Association Type

dependency

Unique resource identifier

url

Codespace

url

Association Type

Cross reference

Spatial representation type

Text, table

Language

English

Character set

UTF8

Topic category

• Elevation
• Geoscientific information
• Oceans

Begin date

2000-01-01

End date

2017-12-31

Supplemental Information

It is recommended that careful attention be paid to the contents of any data, and that the author be contacted with any questions regarding appropriate use. If you find any errors or omissions, please report them to polardatacentre@bas.ac.uk.

Title

European Petroleum Survey Group (EPSG) Geodetic Parameter Registry

Date (Publication)

2008-11-12

Cited responsible party

Organisation name	Individual name	Electronic mail address	Role
European Petroleum Survey Group		EPSGadministrator@iogp.org	Publisher

Unique resource identifier

urn:ogc:def:crs:EPSG::3031

Version

6.18.3

Hierarchy level

Dataset

Statement

Methodology:

The multibeam swath bathymetry data were collected on scientific cruises undertaken by British Antarctic Survey (BAS) on RRS James Clark Ross: JR53-AMT11, JR287, JR15001 and JR16-NG.

The grid was created using the mbgrid program from MB-system version 5.5.2336 , using the parameters " -E0.0005/0.0005/degrees! -G4 -A2 -F1 -R-14.57/-14.17/-8.12/-7.75" for Arc/Info and ArcView ASCII grid and " -E0.0005/0.0005/degrees! -G3 -A2 -F1 -R-14.57/-14.17/-8.12/-7.75" for the netCDF file. This uses a Gaussian weighted mean filter and the bathymetry is gridded as topography (positive upwards)

Data quality:

Quality control was undertaken manually to remove any outliers in the source datasets. This involved cleaning much of the raw data using the "mbedit" command from MB-system.

Metadata

File identifier

afba710f-dab1-4a63-867b-520177388224 XML

Metadata language

English

Character set

UTF8

Hierarchy level

Dataset

Hierarchy level name

dataset

Date stamp

2019-09-12

Metadata standard name

ISO 19115 Geographic Information - Metadata

Metadata standard version

ISO 19115:2003(E)

Metadata author

Organisation name	Individual name	Electronic mail address	Role
NERC EDS UK Polar Data Centre		polardatacentre@bas.ac.uk	Point of contact