USGS OFR 2012-1006: High-Resolution Geophysical Data From the Inner Continental Shelf at Vineyard Sound, Massachusetts Figure 1

U.S. Geological Survey Open-File Report 2012-1006

High-Resolution Geophysical Data From the Inner Continental Shelf at Vineyard Sound, Massachusetts

/ Title Page/ List of Figures / Conversion Factors / Abstract / Introduction / Data Collection / Acknowledgments / References Cited / Geospatial Data / Index /

map showing acoustic backscatter intensity of the seafloor in the vineyard sound survey area

Figure 6. Map showing acoustic-backscatter intensity of the seafloor in the Vineyard Sound, Massachusetts, survey area. Backscatter intensity is an acoustic measure of reflectivity of the seafloor. In general, higher values (light tones) represent rock, boulders, cobbles, gravel, and coarse sand. Lower values (dark tones) generally represent fine sand and muddy sediment. Backscatter intensity scale values are relative digital number (DN) values based an 8-bit data range (0-255). Abbreviations on figure are explained in the Abbreviations.

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