Integrating terrestrial and airborne Lidar to calibrate vertical distribution of foliage area
Terrestrial laser scanning (TLS) provides a more accurate vertical distribution of foliage area than airborne laser scanning (ALS) and could be used as calibration data for ALS data.This paper compared a single tree’s vertical profiles of foliage area from TLS data and ALS data respectively.Then the suitable layer height was determined as 0.5 m for ALS percentile distribution (PD) calibration.Finally plot-based TLS foliage height profiles and ALS PD which came from different return class were compared by different plot size (5 m<R<15 m).The result of this study showed that: 1) the height of peak value of ALS PD was higher than TLS foliage height profiles due to occlusion; and 2) regressions between TLS foliage height profiles and ALS PD,demonstrated better correspondence using 2th order polynomial than linear regression; 3) the decision coefficient R2 between TLS foliage height profiles and ALS PD varied between 0.82-0.97,and the ALS PD using first and single returns were highly correlated with TLS foliage height profile; 4) the plot radius of 10 m was suitable size for TLS calibrate the ALS PD.
Liu Luxia Pang Yong
Institute of Forest Resource Information Technique, Chinese Academy of Forestry,Beijing 100091, China
国际会议
北京
英文
279-287
2013-10-09（万方平台首次上网日期，不代表论文的发表时间）