Waterlines delimiting the edge of the Hunga Tonga - Hunga Ha'apai island between April 2017 and April 2022
| Dataset title | Waterlines delimiting the edge of the Hunga Tonga - Hunga Ha'apai island between April 2017 and April 2022 |
|---|---|
| Dataset creators | Alessandro Novellino, British Geological Survey David Tappin, British Geological Survey Luke Bateson, British Geological Survey Sebastian Watt, University of Birmingham |
| Dataset theme | Geoscientific Information |
| Dataset abstract | Waterlines have been extracted to delimit the edge of the Hunga Tonga - Hunga Ha'apai island between April 2017 and April 2022. Waterline is defined as the instantaneous land - water boundary at the time of the imaging process. Waterlines have been generated by BGS - Earth Observation team through a thresholding-based classification based on Sentinel-2 multispectral imagery and developed on Google Earth Engine. Specifically, the thresholding has been applied to the Normalized Difference Water Index (NDWI) has been derived as a basis to discriminate between the land and sea based on their spectral characteristics. Changes in waterlines over volcanic islands can provide key information to understand volcanic processes. For more info on the methodology, see Novellino et al. (2020) https://doi.org/10.3390/app10020536 |
| Dataset content dates | 01/04/2017 to 30/04/2022 |
| Dataset spatial coverage | Hunga Tonga - Hunga Ha'apai |
| Dataset supply format | Shapefile |
| Dataset language | English-United Kingdom |
| Dataset discovery metadata record | Discovery Link to the dataset's BGS Discovery Metadata record. |
| Dataset publisher | NERC EDS National Geoscience Data Centre |
| Dataset publication date | 3rd December 2022 |
| Dataset digital object identifier(DOI) | 10.5285/1a7715dd-9adb-4a44-ad87-75ca5202f859 |
| Dataset citation text | Novellino, A., Tappin, D., Bateson, L., Watt, S. (2022). Waterlines delimiting the edge of the Hunga Tonga - Hunga Ha'apai island between April 2017 and April 2022. NERC EDS National Geoscience Data Centre. (Dataset). https://doi.org/10.5285/1a7715dd-9adb-4a44-ad87-75ca5202f859 |
| Constraints and terms of use | This data set is available under Open Government Licence, subject to the following acknowledgement accompanying any reproduced materials: "Contains data supplied by permission of the Natural Environment Research Council [YEAR]". |
| Access the dataset | https://webapps.bgs.ac.uk/services/ngdc/accessions/index.html#item176958. |
| Further information | Novellino, A.; Engwell, S.L.; Grebby, S.; Day, S.; Cassidy, M.; Madden-Nadeau, A.; Watt, S.; Pyle, D.; Abdurrachman, M.; Edo Marshal Nurshal, M.; Tappin, D.R.; Andri Kurniawan, I.; Hunt, J. Mapping Recent Shoreline Changes Spanning the Lateral Collapse of Anak Krakatau Volcano, Indonesia. Appl. Sci. 2020, 10, 536. https://doi.org/10.3390/app10020536 |