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Optimizing an Inner-Continental Shelf Geologic Framework Investigation through Data Repurposing and Machine Learning

1
Woods Hole Coastal and Marine Science Center, U.S. Geological Survey, Woods Hole, MA 02543, USA
2
Santa Barbara Museum of Natural History Sea Center, Santa Barbara, CA 93101, USA
*
Author to whom correspondence should be addressed.
Geosciences 2019, 9(5), 231; https://doi.org/10.3390/geosciences9050231
Received: 30 March 2019 / Revised: 14 May 2019 / Accepted: 15 May 2019 / Published: 21 May 2019
(This article belongs to the Special Issue Geological Seafloor Mapping)
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Abstract

The U.S. Geological Survey (USGS) and the National Oceanic Atmospheric Administration (NOAA) have collected approximately 5400 km2 of geophysical and hydrographic data on the Atlantic continental shelf between Delaware and Virginia over the past decade and a half. Although originally acquired for different objectives, the comprehensive coverage and variety of data (bathymetry, backscatter, imagery and physical samples) presents an opportunity to merge collections and create high-resolution, broad-scale geologic maps of the seafloor. This compilation of data repurposes hydrographic data, expands the area of geologic investigation, highlights the versatility of mapping data, and creates new geologic products that would not have been independently possible. The data are classified using a variety of machine learning algorithms, including unsupervised and supervised methods. Four unique classes were targeted for classification, and source data include bathymetry, backscatter, slope, curvature, and shaded-relief. A random forest classifier used on all five source data layers was found to be the most accurate method for these data. Geomorphologic and sediment texture maps are derived from the classified acoustic data using over 200 ground truth samples. The geologic data products can be used to identify sediment sources, inform resource management, link seafloor environments to sediment texture, improve our understanding of the seafloor structure and sediment pathways, and demonstrate how ocean mapping resources can be useful beyond their original intent to maximize the footprint and scientific impact of a study. View Full-Text
Keywords: hydrographic data; geophysical data; machine learning; geologic maps; seafloor geology; MBES data; backscatter hydrographic data; geophysical data; machine learning; geologic maps; seafloor geology; MBES data; backscatter
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Pendleton, E.A.; Sweeney, E.M.; Brothers, L.L. Optimizing an Inner-Continental Shelf Geologic Framework Investigation through Data Repurposing and Machine Learning. Geosciences 2019, 9, 231.

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