Applications of Underwater Photogrammetry
Abstract
The reliability of a photogrammetric system is a function of the degree of constraints applied to the system. Mapping tests have been performed to investigate the relative importance of these constraints. Underwater mapping consists of five elements: (1) ground control, (2) photogrammetric equipment, (3) field techniques, (4) photogrammetric analyses, and (5) final presentation. Ground control was provided by a 160 foot square underwater net. A photogrammetric camera was improvised by calibrating a hand-held 70mm water corrected underwater camera, which was mounted to the wet submersible PEGASUS. Photogrammetric analyses were performed by assembling a radial line plot for a horizontal control solution and employing this horizontal control for a vertical bridge of three models. The result was an establishment of over 1200 additional horizontal points, a planimetric map of the entire area, a detailed, one inch, contoured map of the three models, and a photo-mosaic of the area.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1968
- Accession Number
- AD0851692
Entities
People
- Joseph Pollio
Organizations
- Naval Oceanographic Office