Remote Sens. 2013, 5(6), 3037-3056; doi:10.3390/rs5063037
Article

Testing the Application of Terrestrial Laser Scanning to Measure Forest Canopy Gap Fraction

Received: 12 April 2013; in revised form: 17 May 2013 / Accepted: 13 June 2013 / Published: 19 June 2013
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Abstract: Terrestrial laser scanners (TLS) have the potential to revolutionise measurement of the three-dimensional structure of vegetation canopies for applications in ecology, hydrology and climate change. This potential has been the subject of recent research that has attempted to measure forest biophysical variables from TLS data, and make comparisons with two-dimensional data from hemispherical photography. This research presents a systematic comparison between forest canopy gap fraction estimates derived from TLS measurements and hemispherical photography. The TLS datasets used in the research were obtained between April 2008 and March 2009 at Delamere Forest, Cheshire, UK. The analysis of canopy gap fraction estimates derived from TLS data highlighted the repeatability and consistency of the measurements in comparison with those from coincident hemispherical photographs. The comparison also showed that estimates computed considering only the number of hits and misses registered in the TLS datasets were consistently lower than those estimated from hemispherical photographs. To examine this difference, the potential information available in the intensity values recorded by TLS was investigated and a new method developed to estimate canopy gap fraction proposed. The new approach produced gap fractions closer to those estimated from hemispherical photography, but the research also highlighted the limitations of single return TLS data for this application.
Keywords: terrestrial laser scanning; forest canopy gap fraction; intensity data
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MDPI and ACS Style

Ramirez, F.A.; Armitage, R.P.; Danson, F.M. Testing the Application of Terrestrial Laser Scanning to Measure Forest Canopy Gap Fraction. Remote Sens. 2013, 5, 3037-3056.

AMA Style

Ramirez FA, Armitage RP, Danson FM. Testing the Application of Terrestrial Laser Scanning to Measure Forest Canopy Gap Fraction. Remote Sensing. 2013; 5(6):3037-3056.

Chicago/Turabian Style

Ramirez, F. A.; Armitage, Richard P.; Danson, F. M. 2013. "Testing the Application of Terrestrial Laser Scanning to Measure Forest Canopy Gap Fraction." Remote Sens. 5, no. 6: 3037-3056.

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