Still image from 3D model of Lone Star Geyser, Yellowstone
Computer model of Lone Star Geyser constructed from multiple overlapping and scaled photographs and looking down into the geyser vent. This is a perspective that is only possible with images collected specifically to build a 3D model. Only the inner portion is obscured because in all the images, this area is continuously blanketed in opaque vapor. In the upper right of the image, an elongate rectangular control scale, used to calibrate the image, is visible.