Gridded bathymetric compilation of Ryder Bay from raw and processed multibeam echosounder data collected by the RRS James Clark Ross (2001 - 2016)
GB/NERC/BAS/PDC/01312
Abstract:
We present a bathymetric compilation of Ryder Bay here defined by the following bounding box: 68.48 to 68W, 67.7 to 67.46S. This bathymetry grid was compiled from a variety of multibeam swath bathymetry data acquired during 18 different cruises (see lineage) undertaken by the RRS James Clark Ross. The data is available as a grid of 0.0005 degrees 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.
Citation:
Fremand, A. (2020). Gridded bathymetric compilation of Ryder Bay from raw and processed multibeam echosounder data collected by the RRS James Clark Ross (2001 - 2016) (Version 1.0) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/0f4d7d85-1e38-4e0e-80af-1fcd85267ffc
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License
| Use: | This data is covered by a UK Open Government Licence (http://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/) Further by downloading this data the user acknowledges that they agree with the NERC data policy (http://www.nerc.ac.uk/research/sites/data/policy.asp), and the following conditions: 1. To cite the data Fremand, A. (2020). Gridded bathymetric compilation of Ryder Bay from raw and processed multibeam echosounder data collected by the RRS James Clark Ross (2001 - 2016) [Data set]. UK Polar Data Centre, Natural Environment Research Council, UK Research & Innovation. https://doi.org/10.5285/0F4D7D85-1E38-4E0E-80AF-1FCD85267FFC 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. |
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Basic Information
| Creation Date: | 2020-03-03 |
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| Dataset Progress: | Complete |
| Dataset Language: | English |
| ISO Topic Categories: |
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| Parameters: |
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Additional Information
| Quality: | The grid contains both raw and processed data. | |
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| Lineage/Methodology: | The bathymetry map was compiled from a variety of different data sources. The primary data are multibeam swath bathymetry collected from scientific cruises undertaken by British Antarctic Survey (BAS). The complete list of cruises used for the compilation is described below: RRS James Clark Ross expeditions: JR59, JR69-67, JR71, JR84, JR112, JR157-166, JR158, JR165, JR179, JR185, JR194-197, JR230, JR254D, JR298, JR306-307, JR312, JR15003, JR16003 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 -C2 -R-68.48/-68/-67.7/-67.46" for Arc/Info and ArcView ASCII grid and -E0.0005/0.0005/degrees! -G3 -A2 -F1 -C2 -R-68.48/-68/-67.7/-67.46" for the netCDF file. This uses a Gaussian weighted mean filter, a spline interpolation to fill grid cells not filled by swath data (mode 2 is chosen, the interpolation fills all undefined cells within a distance of clip cells from data) and the bathymetry is gridded as topography (positive upwards) given in meters. |
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Extent
| Temporal Coverage: | |
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| Start Date | 2001-01-01 |
| End Date | 2016-12-31 |
| Spatial Coverage: | |
| Latitude | |
| Southernmost | -67.7 |
| Northernmost | -67.46 |
| Longitude | |
| Westernmost | -68.48 |
| Easternmost | -68 |
| Altitude | |
| Min Altitude | N/A |
| Max Altitude | N/A |
| Depth | |
| Min Depth | N/A |
| Max Depth | N/A |
| Data Resolution: | |
| Latitude Resolution | 0.0005 degrees |
| Longitude Resolution | 0.0005 degrees |
| Horizontal Resolution Range | 30 meters - < 100 meters |
| Vertical Resolution | N/A |
| Vertical Resolution Range | N/A |
| Temporal Resolution | N/A |
| Temporal Resolution Range | N/A |
| Location: | |
| Location | Antarctica |
| Detailed Location | Ryder Bay |
Instrumentation
| Sensor(s): |
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| Source(s): |
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| Data Collection: | Bathymetric data was collected using a hull-mounted EM120 or EM122 Multibeam Echo Sounder (MBES). The EM122 equipment was operated using Kongsberg Seafloor Information System (SIS) and Helmsman software. |
Storage
| Distribution: | |
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| Distribution Media | Online Internet (HTTP) |
| Distribution Size | 5.6 MB |
| Distribution Format | ASCII |
| Fees | N/A |
| Data Storage: | This dataset constains 2 files: - RyderBay_G4C2_0005d.asc ~3.7 MB - RyderBay_G3C2_0005d.grd ~1.8 MB |