Figure 8. Map showing backscatter intensity recorded with an SEA (undated) SWATHplus interferometric sonar system during the U. S. Geological Survey geophysical survey of Red Brook Harbor, Massachusetts. Low backscatter values are represented by dark tones, while high backscatter returns are shown by lighter tones. (Aerial photography of land areas from Environmental Systems Research Institute (2010) World Imagery ArcGIS Map Service, aerial photography of water areas from [Massachussets] Office of Geographic Information (2010).)
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