Aerial and Close-Range Photogrammetric Technology; Providing Resource Documentation, Interpretation, and Preservation

摘要

Photogrammetry is the art and science of obtaining precise mathematical measurements and three-dimensional (3D) data from two or more photographs. The Bureau of Land Management has benefited from its in-house photogrammetric capabilities, support, and expertise for more than 20 years. This support includes creating unique and value-added digital datasets and serving as subject matter experts and contracting officers representatives to obtain aerial photography and other types of 3D data. Traditionally, most people think of photogrammetry in the context of aerial photography. Photogrammetric techniques can be applied to virtually any source of imagery, whether it comes from 35-mm digital cameras or an earth-orbiting satellite. As long as the images are captured with stereoscopic overlap, one can derive accurate 3D data at a very wide range of scales.