Image processing of airborne scanning laser altimetry for some environmental applications

1999 ◽  
Author(s):  
David C. Mason ◽  
David M. Cobby ◽  
Ian J. Davenport
Keyword(s):  
Image Processing ◽  
Environmental Applications ◽  
Scanning Laser ◽  
Laser Altimetry

scholarly journals Airborne measurement of glacier surface elevation by scanning laser altimeter

1997 ◽  
Vol 24 ◽  
pp. 293-296 ◽  
Author(s):  
Michael Kennett ◽  
Trond Eiken
Keyword(s):  
Remote Sensing ◽  
Laser Scanning ◽  
Laser System ◽  
Scanning Laser ◽  
Noise Levels ◽  
Laser Altimetry ◽  
Laser Altimeter ◽  
Glacier Surface ◽  
Airborne Measurement ◽  
Dimensional Distribution

Airborne scanning laser altimetry is a relatively new technique for remote sensing of ground elevation. A laser ranger is scanned across a swath beneath the aircraft, producing a two-dimensional distribution of elevations when combined with data on aircraft position and orientation. Smooth snow-covered glaciers are ideal surfaces for laser scanning since they are highly reflective. A new prototype laser system is described together with results from Hardangerjökulen, Norway. An analysis of the data shows that noise levels are very low at around 2 cm, and that repeatability between overlapping swaths is approximately ± 10 cm. This is consistent with an absolute accuracy of 15 cm or better from manufacturer’s and other measurements. Swath widths of over 1 km are attainable, at lowing complete coverage of small to medium-sized glaciers using parallel flight tracks. The high accuracy and dense, even coverage (about 20 000 points per km2) gives good-quality derived products such as DEMs and enables reliable measurement of glacier volume change. Scanning laser altimetry has many advantages over photogrammetry, which was previously the only remote-sensing method of measuring elevations over large areas but which performs poorly over snow-covered glaciers.

An airborne scanning laser altimetry survey of Long Valley, California

2000 ◽  
Vol 21 (12) ◽  
pp. 2413-2437 ◽  
Author(s):  
M. A. Hofton ◽  
J. B. Blair ◽  
J.-B. Minster ◽  
J. R. Ridgway ◽  
N. P. Williams ◽  
...  
Keyword(s):  
Scanning Laser ◽  
Laser Altimetry ◽  
Long Valley

Assessment of airborne scanning laser altimetry (lidar) in a deltaic wetland environment

2003 ◽  
Vol 29 (6) ◽  
pp. 718-728 ◽  
Author(s):  
Jessika Töyrä ◽  
Alain Pietroniro ◽  
Christopher Hopkinson ◽  
William Kalbfleisch
Keyword(s):  
Scanning Laser ◽  
Laser Altimetry

scholarly journals Airborne measurement of glacier surface elevation by scanning laser altimeter

1997 ◽  
Vol 24 ◽  
pp. 293-296 ◽  
Author(s):  
Michael Kennett ◽  
Trond Eiken
Keyword(s):  
Remote Sensing ◽  
Laser Scanning ◽  
Laser System ◽  
Scanning Laser ◽  
Noise Levels ◽  
Laser Altimetry ◽  
Laser Altimeter ◽  
Glacier Surface ◽  
Airborne Measurement ◽  
Dimensional Distribution

Airborne scanning laser altimetry is a relatively new technique for remote sensing of ground elevation. A laser ranger is scanned across a swath beneath the aircraft, producing a two-dimensional distribution of elevations when combined with data on aircraft position and orientation. Smooth snow-covered glaciers are ideal surfaces for laser scanning since they are highly reflective. A new prototype laser system is described together with results from Hardangerjökulen, Norway. An analysis of the data shows that noise levels are very low at around 2 cm, and that repeatability between overlapping swaths is approximately ± 10 cm. This is consistent with an absolute accuracy of 15 cm or better from manufacturer’s and other measurements. Swath widths of over 1 km are attainable, at lowing complete coverage of small to medium-sized glaciers using parallel flight tracks. The high accuracy and dense, even coverage (about 20 000 points per km2) gives good-quality derived products such as DEMs and enables reliable measurement of glacier volume change. Scanning laser altimetry has many advantages over photogrammetry, which was previously the only remote-sensing method of measuring elevations over large areas but which performs poorly over snow-covered glaciers.

Use of fused airborne scanning laser altimetry and digital map data for urban flood modelling

2007 ◽  
Vol 21 (11) ◽  
pp. 1436-1447 ◽  
Author(s):  
David C. Mason ◽  
Matthew S. Horritt ◽  
Neil M. Hunter ◽  
Paul D. Bates
Keyword(s):  
Scanning Laser ◽  
Laser Altimetry ◽  
Digital Map ◽  
Urban Flood ◽  
Flood Modelling ◽  
Map Data ◽  
Urban Flood Modelling
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