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The accuracy of a river bed moulding/casting system and the effectiveness of a low-cost digital camera for recording river bed fabric

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journal contribution
posted on 04.07.2006, 14:48 by Jim H. Chandler, Thomas Buffin-Belanger, Stephen P. Rice, Ian Reid, David J. Graham
Digital photogrammetry has been used to develop and test an artificial river bed moulding and casting system, which allows the pebbles within a coarse grain river bed to be recreated for hydraulic research in a laboratory flow channel or flume. Imagery of both the original streambed and the cast facsimile was acquired using a non-metric Kodak DCS460 digital camera and digital elevation models and orthophotographs were derived and compared to assess the accuracy of the moulding and casting system. These comparative tests proved to be critical in modifying and developing the system. Additional imagery was obtained in the field using a non-metric Olympus C3030 “compact” digital camera to assess whether far cheaper camera technology could deliver data appropriate for such comparative examinations. Internal calibration parameter sets and data that were generated were compared with data obtained by the non-metric Kodak DCS460. These tests demonstrate that digital sensors built around highquality 35 mm professional camera bodies and lenses are required for comparative examinations and for similar system development.

History

School

  • Social Sciences

Department

  • Geography and Environment

Pages

976983 bytes

Citation

CHANDLER, J.H. ... et al, 2003. The accuracy of a river bed moulding/casting system and the effectiveness of a low-cost digital camera for recording river bed fabric. The Photogrammatic Record, 18(103), pp. 209-224

Publisher

© Blackwell

Publication date

2003

Notes

This article was published in the journal, The Photogrammatic Record [© Blackwell] and the definitive version is available at: http://www.blackwell-synergy.com/loi/phor.

ISSN

0197-9337

Language

en

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