Accurate visual assessment of the interiors of manholes, boreholes, drilled shafts, or other vertical cavities is essential for efficient planning, maintenance, rehabilitation, and replacement. On-site inspection can be accomplished by lowering a trained inspector into the confined space, but more often requires deployment of a pan-and-zoom pole camera to capture the needed images for onsite or later analysis.The Panoramo SI 3D Optical Manhole Scanner by RapidView provides an alternative method of inspecting. The system creates a digital 3D visual model of the structure that can be rotated, panned, zoomed, and measured on a computer screen. The Viewer software puts users
