Enhanced sidescan-sonar imagery, north-central Long Island Sound
Open-File Report
2008-1174
By: K.Y. McMullen, L.J. Poppe, P.T. Schattgen, and E. F. Doran
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Abstract
The U.S. Geological Survey, National Oceanic and Atmospheric Administration (NOAA), and Connecticut Department of Environmental Protection have been working cooperatively to map the sea-floor geology within Long Island Sound. Sidescan-sonar imagery collected during three NOAA hydrographic surveys (H11043, H11044, and H11045) was used to interpret the surficial-sediment distribution and sedimentary environments within the Sound. The original sidescan-sonar imagery generated by NOAA was used to evaluate hazards to navigation, which does not require consistent tonal matching throughout the survey. In order to fully utilize these data for geologic interpretation, artifacts within the imagery, primarily due to sidescan-system settings (for example, gain changes), processing techniques (for example, lack of across-track normalization) and environmental noise (for example, sea state), need to be minimized. Sidescan-sonar imagery from surveys H11043, H11044, and H11045 in north-central Long Island Sound was enhanced by matching the grayscale tones between adjacent sidescan-sonar lines to decrease the patchwork effect caused by numerous artifacts and to provide a more coherent sidescan-sonar image for use in geologic interpretation.
Suggested Citation
McMullen, K., Poppe, L., Schattgen, P., Doran, E.F., 2008, Enhanced sidescan-sonar imagery, north-central Long Island Sound: U.S. Geological Survey Open-File Report 2008-1174, HTML Document, https://doi.org/10.3133/ofr20081174.
ISSN: 2331-1258 (online)
ISSN: 0196-1497 (print)
Study Area
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Enhanced sidescan-sonar imagery, north-central Long Island Sound |
| Series title | Open-File Report |
| Series number | 2008-1174 |
| DOI | 10.3133/ofr20081174 |
| Year Published | 2008 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Contributing office(s) | U.S. Geological Survey |
| Description | HTML Document |
| Country | United States |
| State | New York, Connecticut |
| Other Geospatial | north-central Long Island Sound |
| Online Only (Y/N) | N |
| Additional Online Files (Y/N) | Y |