VIDEO: A “virtual” fly-through of Halema‘uma‘u Crater

Visual photographs taken during helicopter USGS overflights of Halema‘uma‘u Crater in Hawaii Volcanoes National Park on the Big Island are used to create 3D models of the crater. This technique is called structure-from-motion photogrammetry and uses the multiple perspectives captured in dozens of photos to reconstruct the crater shape. HVO scientists use these models to help calculate erupted volume, eruption rate, and measure the size of features in the crater.