bronzová úroveň ověřený automaticky US beta
Úroveň certifikace: bronzová úroveň 24 October 2015 Co to v praxi znamená: Datová sada splňuje základní požadavky na otevřená data.
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.
http://catalog.data.gov/dataset/preliminary-hard-and-soft-bottom-seafloor-substrate-map-derived-from-an-unsupervised-classificaca145 Do you think this data is incorrect? Let us know
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