Description
Preliminary hard and soft seafloor substrate map derived from an unsupervised classification of multibeam backscatter and bathymety derivatives at Pagan Island, Commonwealth of the Northern Mariana Islands (CNMI). The dataset was derived using Reson 8101 backscatter data, bathymetric variance and bathymetric rugosity. The sonar frequency is 240 kHz for the Reson 8101 backscatter data, which were resampled to a 5 m grid cell size prior to the classification. Limited seafloor photographs for groundtruthing are available for Guam and therefore no supervised classification was performed and we are unable to visually or quantitatively evaluate the accuracy of the unsupervised classification seafloor substrate map. However, in locations such French Frigate Shoals, NWHI and Tutuila, American Samoa, where ground truth data are available, the unsupervised classification method is a robust predictor of substrate type in similar depth ranges and seafloor environments.
Resources
| Name | Format | Description | Link |
|---|---|---|---|
| Web Resource | Unknown | Open resource |
Tags
- 1398
- acoustic imagery
- aquatic habitat
- backscatter
- bathymetry
- bathymetry/seafloor topography
- benthic habitat
- benthic habitat mapping and characterization - commonwealth of the northern mariana islands and guam
- biosphere
- central pacific
- cnmi
- coastal processes
- commonwealth of the northern mariana islands
- coral reef ecology
- coral reefs
- corals
- coris_metadata
- country/territory
- earth science
- geographic information
- habitat mapping
- habitats
- hard bottom
- hard seafloor substrate
- mapping
- multibeam backscatter
- multibeam sonar
- northern mariana islands
- ocean basin
- oceans
- pacific ocean
- pagan
- pagan island
- pagan island (18n145e0001)
- reef monitoring and assessment
- soft bottom
- soft seafloor substrate
- substrate
- united states of america
- unsupervised classification
- western pacific ocean
- zoology