Journal article

Optimizing photogrammetric DEMs for glacier volume change assessment using laser-scanning derived ground-control points

Nicholas E Barrand, Tavi Murray, Timothy D James, Stuart L Barr, Jon P Mills

Journal of Glaciology | CAMBRIDGE UNIV PRESS | Published : 2009

Abstract

AbstractPhotogrammetric processing of archival stereo imagery offers the opportunity to reconstruct glacier volume changes for regions where no such data exist, and to better constrain the contribution to sea-level rise from small glaciers and ice caps. The ability to derive digital elevation model (DEM) measurements of glacier volume from photogrammetry relies on good-quality, well-distributed ground reference data, which may be difficult to acquire. This study shows that ground-control points (GCPs) can be identified and extracted from point-cloud airborne lidar data and used to control photogrammetric glacier models. The technique is applied to midtre Lovénbreen, a small valley glacier in..

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Grants

Awarded by UK Natural Environment Research Council (NERC)


Awarded by NERC


Awarded by Engineering and Physical Sciences Research Council


Awarded by Natural Environment Research Council


Funding Acknowledgements

This work was made possible by a UK Natural Environment Research Council (NERC) studentship (NER/S/A/2003/11279) and RSPSoc travel bursary awarded to N.E.B., NERC grant NE/B505203/1 awarded to T.M. and the efforts of the NERC Airborne Research and Survey Facility (ARSF). Lidar data were processed by the University of Cambridge, Unit for Landscape Modelling (ULM). GPS equipment and training were provided by the NERC Geophysical Equipment Facility (GEF), and M. King (Newcastle University) provided GAMIT-processed GPS baselines. Field and logistical support at the NERC Arctic Research Station were provided by N. Cox and B. Barrett. Three-dimensional visualization software was provided by Applied Imagery, Silver Spring, MD, USA, and SocetSet photogrammetric processing software was provided by BAE Systems. We thank H. Rott, A. Arendt and an anonymous reviewer for comments that improved the manuscript.