HR: 11:05h
AN: C42A-04    [Abstracts]
TI: Applications of modern digital terrestrial photogrammetry to problems in glaciology.
AU: * Pfeffer, W
EM: pfeffer@tintin.Colorado.EDU
AF: Department of Civil,Environmental,and Architectural Engineering Associate Director, Institute of Arctic and Alpine Research University of Colorado , 1560 30th St., Boulder, CO 80309-0450 United States
AB: Recent developments in digital photogrammetry allow reliable, accurate, stereometric models of detailed objects such as glaciers to be constructed at reduced cost and effort in comparison to conventional film-based aerial or terrestrial photogrammetric methods. These developments include: 1) Correction of lens distortion by digital remapping of images; 2) Digital measurement of image space coordinate measurements; 3) Ease with which multiple stereomodels may be combined, permitting redundancy and strong parallax. These improvements make stereophotogrammetry a practical and cost effective alternative to other mapping procedures (e.g. optical survey, laser profiling) for small- to medium-scale glaciology projects. The relative strengths of digital terrestrial photogrammetry are compared to traditional film-based photogrammetric procedures as well as to other ground-based and airborne survey methods and satellite imagery, and several examples of terrestrial photogrammetric applications to glaciers are presented, including topographic profiling, velocity determination, and structural mapping.
DE: 1827 Glaciology (1863)
SC: Cryosphere [C]
MN: 2004 AGU Fall Meeting