The Ocean Archive System searches our original datasets as they were submitted to us, not individual points or profiles. If you want to search and retrieve ocean profiles in a common format, or objectively analyzed fields, your better option may be to use one of our project applications. See: Access Data
OAS accession Detail for 0259452, meta_version: 7. Current meta_version is: 8
| << previous | |revision: 7| | next >> |
| accessions_id: | 0259452 | archive |
|---|---|
| Title: | NCCOS Mapping: Satellite derived bathymetry and benthic habitat mapping to support sea level rise models for the area surrounding Roi-Namur Island, Kwajalein Atoll, Republic of the Marshall Islands (NCEI Accession 0259452) |
| Abstract: | Satellite Derived Bathymetry (SDB), benthic habitat, and hydrodynamic friction maps were generated for a study area surrounding Roi-Namur Island, part of the Kwajalein Atoll of the Republic of the Marshall Islands. The SDB and habitat maps were generated from WorldView-2 and -3 satellite imagery. These layers were needed as part of a larger effort to model the impacts of sea-level rise and inundation on Department of Defense installations on atolls in the Pacific Ocean. Tide corrected depth data to parameterize the SDB models and underwater video to aid in classification of the benthic habitat map were collected in the field during an April 2014 mission to Kwajalein Atoll. No video data were submitted in this dataset. For a complete description technique and results see Field et al. 2022. |
| Date received: | 20220829 |
| Start date: | 20091209 |
| End date: | 20150123 |
| Seanames: | Northwest Pacific Ocean (limit-180) |
| West boundary: | 167.4436 |
| East boundary: | 167.5021 |
| North boundary: | 9.40841 |
| South boundary: | 9.36092 |
| Observation types: | model output |
| Instrument types: | echo sounder |
| Datatypes: | DEPTH - SENSOR, HABITAT - BENTHIC |
| Submitter: | |
| Submitting institution: | US DOC; NOAA; NOS; National Centers for Coastal Ocean Science |
| Collecting institutions: | US DOC; NOAA; NOS; National Centers for Coastal Ocean Science |
| Contributing projects: | CORAL REEF STUDIES |
| Platforms: | |
| Number of observations: | |
| Supplementary information: | Submission Package ID: 83U2H4 Methods: The satellite imagery that was the basis of this effort was from the WorldView-2 and -3 commercial satellites (2m pixel size, 8 spectral bands). Due to issues with tides and cloud cover, 4 satellite images were needed for complete coverage of the study area (12/09/2009, 09/24/2014, 12/29/2014 and 1/23/2015). Non-linear band ratio models were utilized with depth data collected in the field during an April 2014 mission to Kwajalein Atoll to create the SDB. Random points, not used in the SDB models, were selected from the field depth data to provide an estimate of the accuracy of the final product. The benthic habitat maps were generated with the same satellite imagery using a combination of automated image processing techniques and on-screen, heads up digitizing. Underwater video collected during the April 2014 field mission was used as training data for creating the maps. The resulting benthic habitat map was converted to a spatially varying friction coefficient map, using friction values for coral reef habitats from the literature. File Information: Total File Size: 128 MB total, 17 files in 1 folder (unzipped), 5.13 MB (zipped) Data File Format(s): GeoTiff .TIF (and ancillary files .TFW, .AUX, .OVR, .XML) Data File Resolution: 2m X 2m resolution; 3193 cols X 2605 rows GIS Projection: Projected Coordinate System: UTM Zone 58N (WKID 32658), Geographic Coordinate System: WGS 84 (WKID 4326) Data Files: •Satellite_Derived_Bathymetry_Roi-Namur.tif •Benthic_habitats_Roi-Namur.tif •Hydrodynamic_Friction_Roi-Namur.tif Documentation Files: •BrowseGraphic.JPG •DataDocumentation.PDF |
| Availability date: | |
| Metadata version: | 7 |
| Keydate: | 2022-09-06 15:30:36+00 |
| Editdate: | 2022-09-13 14:40:53+00 |