Figure 17. Digital terrain model (DTM) of the sea floor produced from the combined multibeam bathymetry collected during National Oceanic and Atmospheric Administration surveys H12009, H12010, H12011, H12015, H12033, H12137, and H12139 in Block Island Sound, offshore Rhode Island. Image is sun-illuminated from the north and vertically exaggerated 5x. Warmer colors are shallower areas; cooler colors are deeper areas. See key for depth ranges.