NERC Data Catalogue Service
A bathymetric compilation of Ascension Island, 2000-2017
We present a new bathymetric compilation around Ascension Island here defined by the following bounding box: 14.57 to 14.17 W, 8.12 to 7.75 S.
This bathymetry grid was compiled from a variety of multibeam swath bathymetry data acquired during 4 different cruises (see lineage). The data is available as a grid of approximately 50 m resolution in two different formats: a GMT-compatible (2-D) NetCDF and Arc/Info and ArcView ASCII grid format using geographic coordinates on the WGS84 datum.
Funding was provided by NERC grants NE/J023051/1 and NE/J020303/1
Simple
- 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 Completed
https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/
- Maintenance and update frequency
- asNeeded As needed
- Maintenance note
- completed Completed
- Theme
-
- Ascension Island
- Bathymetry
- Multibeam
- Place
-
- Ascension Island St Helena
- GEMET - INSPIRE themes, version 1.0
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- no limitations to public access
- Access constraints
- otherRestrictions Other restrictions
- Other constraints
- no limitations
- Use constraints
- license License
- Other constraints
- Open Government Licence v3.0
- Use constraints
- otherRestrictions 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
- otherRestrictions 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
- otherRestrictions Other restrictions
- Other constraints
- None
- Unique resource identifier
- url
- Codespace
- url
- Association Type
- dependency dependency
- Unique resource identifier
- url
- Codespace
- url
- Association Type
- crossReference Cross reference
- Spatial representation type
- textTable Text, table
- Metadata language
- engEnglish
- Character set
- utf8 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.
Distributor
https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/
- Name
- text/plain
- Name
- application/x-hdf5
- Name
- application/x-hdf
- Units of distribution
- bytes
- Transfer size
- 8808038
- OnLine resource
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- Units of distribution
- bytes
- Transfer size
- 8808038
- OnLine resource
-
Get Data
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WWW:LINK-1.0-http--link
)
Download data
- Units of distribution
- bytes
- Transfer size
- 8808038
- OnLine resource
-
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- Hierarchy level
- dataset 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.
- File identifier
- afba710f-dab1-4a63-867b-520177388224 XML
- Metadata language
- engEnglish
- Character set
- utf8 UTF8
- Hierarchy level
- dataset 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)
https://www.bas.ac.uk/team/business-teams/information-services/uk-polar-data-centre/
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