Screenshot of the California Seafloor video and photo portal

Interactive map (here with added labels) allows viewers to zoom into areas of interest; video tracklines appear in purple and photograph locations (dots) in red. (At scales shown here, red dots are too closely spaced to distinguish.) Clicking on a trackline starts video in the lower-left window and associated photographs in the lower-right window. This example—sand ripples at a depth of approximately 15 meters (49 feet)—is from a trackline just offshore of Half Moon Bay, California. Two green dots in the video window (from lasers mounted on the camera and used as reference points) are 15 centimeters (6 inches) apart; likewise the red dots in both windows. (Dots are easier to see in online images.) High-resolution versions of the photographs can be viewed by clicking “View original” below photograph window.