Data

Darwin Harbour Habitat Mapping Program: NSGM Morphology Features

Geoscience Australia
Nanson, R.
Viewed: [[ro.stat.viewed]] Cited: [[ro.stat.cited]] Accessed: [[ro.stat.accessed]]
ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rfr_id=info%3Asid%2FANDS&rft_id=https://pid.geoscience.gov.au/dataset/ga/127276&rft.title=Darwin Harbour Habitat Mapping Program: NSGM Morphology Features&rft.identifier=https://pid.geoscience.gov.au/dataset/ga/127276&rft.description=The seafloor morphology mapping approach used to derive this dataset follows Geoscience Australia’s draft National Seafloor GeoMorphology (NSGM) mapping scheme (Nanson and Nichol, 2018). The NSGM scheme is an extension of the Dove et al. (2016) approach, which characterises the seafloor in two sequential parts: Part 1 maps the seafloor Morphology (shape) using bathymetry data, and Part 2 uses additional data to interpret seafloor Geomorphology for those mapped morphological shapes. Part 1 of the NSGM scheme was applied to the project dataset, and consists of three hierarchical levels: Province, Surface and Feature. This dataset is published with the permission of the CEO, Geoscience AustraliaMaintenance and Update Frequency: asNeededStatement: This dataset contains NSGM Feature shapefiles, derived using Benthic Terrain Modeller (Walbridge et al., 2019) for the Darwin Harbour Mapping Project. This tool was applied to a 10m bathymetry grid derived from the principal bathymetry grid of this project (1 m resolution) on the Darwin region (eCat 127094) at a range of annulus settings, to identify High and Low features of interest. The success of each resulting BTM grid was assessed by eye, and the most representative datasets were further processed and generalised by applying ArcGIS Majority Filter and Aggregation tools. The resulting grids were exported to shapefiles and classified into appropriate NSGM Feature categories. Based on this dataset, the study area is characterised by these NSGM Features: Depressions (15%), Platforms (14%), Ridges (13%), Knolls (2%) and Bedforms (fields) (1%).&rft.creator=Nanson, R. &rft.date=2019&rft.coverage=westlimit=130.25; southlimit=-12.725; eastlimit=131.2; northlimit=-12.125; projection=GDA94 (EPSG:4283)&rft.coverage=westlimit=130.25; southlimit=-12.725; eastlimit=131.2; northlimit=-12.125; projection=GDA94 (EPSG:4283)&rft_rights=&rft_rights=Creative Commons Attribution 4.0 International Licence&rft_rights=CC-BY&rft_rights=4.0&rft_rights=http://creativecommons.org/licenses/&rft_rights=Australian Government Security ClassificationSystem&rft_rights=https://www.protectivesecurity.gov.au/Pages/default.aspx&rft_rights=WWW:LINK-1.0-http--link&rft_rights=Creative Commons Attribution 4.0 International Licence http://creativecommons.org/licenses/by/4.0&rft_subject=geoscientificInformation&rft_subject=seabed geomorphic features&rft_subject=Published_External&rft.type=dataset&rft.language=English Access the data
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CC-BY

Creative Commons Attribution 4.0 International Licence
http://creativecommons.org/licenses/by/4.0

Creative Commons Attribution 4.0 International Licence

CC-BY

4.0

http://creativecommons.org/licenses/

Australian Government Security ClassificationSystem

https://www.protectivesecurity.gov.au/Pages/default.aspx

WWW:LINK-1.0-http--link

Access:

Open

Contact Information

clientservices@ga.gov.au

Brief description

The seafloor morphology mapping approach used to derive this dataset follows Geoscience Australia’s draft National Seafloor GeoMorphology (NSGM) mapping scheme (Nanson and Nichol, 2018). The NSGM scheme is an extension of the Dove et al. (2016) approach, which characterises the seafloor in two sequential parts: Part 1 maps the seafloor Morphology (shape) using bathymetry data, and Part 2 uses additional data to interpret seafloor Geomorphology for those mapped morphological shapes. Part 1 of the NSGM scheme was applied to the project dataset, and consists of three hierarchical levels: Province, Surface and Feature. This dataset is published with the permission of the CEO, Geoscience Australia

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Maintenance and Update Frequency: asNeeded
Statement: This dataset contains NSGM Feature shapefiles, derived using Benthic Terrain Modeller (Walbridge et al., 2019) for the Darwin Harbour Mapping Project. This tool was applied to a 10m bathymetry grid derived from the principal bathymetry grid of this project (1 m resolution) on the Darwin region (eCat 127094) at a range of annulus settings, to identify High and Low features of interest. The success of each resulting BTM grid was assessed by eye, and the most representative datasets were further processed and generalised by applying ArcGIS Majority Filter and Aggregation tools. The resulting grids were exported to shapefiles and classified into appropriate NSGM Feature categories. Based on this dataset, the study area is characterised by these NSGM Features: Depressions (15%), Platforms (14%), Ridges (13%), Knolls (2%) and Bedforms (fields) (1%).

Created: 27 02 2019

Issued: 22 01 2020

Data time period: 2011 to 2017

This dataset is part of a larger collection

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131.2,-12.125 131.2,-12.725 130.25,-12.725 130.25,-12.125 131.2,-12.125

130.725,-12.425

text: westlimit=130.25; southlimit=-12.725; eastlimit=131.2; northlimit=-12.125; projection=GDA94 (EPSG:4283)

Subjects
Published_External | geoscientificInformation | seabed geomorphic features |

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Other Information
Download the data (shp) [1.5 MB]

uri : https://d28rz98at9flks.cloudfront.net/127276/127276_00_0.zip

Link to collection record

uri : https://pid.geoscience.gov.au/dataset/ga/127494

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