Three-Dimensional Modeling of an Urban Park and Trees by Combined Airborne and Portable On-Ground Scanning LIDAR Remote Sensing |
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Authors: | K Omasa F Hosoi T M Uenishi Y Shimizu Y Akiyama |
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Institution: | (1) Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi 1-1-1, Bunkyo-ku Tokyo, 113-8657, Japan;(2) Aero Asahi Co., Shinsayama 1-18-1 Sayama, Saitama 350-1331, Japan |
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Abstract: | In this study, we confirmed the utility of airborne and portable on-ground scanning light detection and ranging (LIDARs) for
three-dimensional visualization of an urban park and quantification of biophysical variables of trees in the park. The digital
canopy height model (DCHM) and digital terrain model generated from airborne scanning LIDAR data provided precise images of
the ground surface and individual tree canopies. The heights of 166 coniferous and broadleaf trees of 11 species in the park
were estimated from the DCHM images with slight underestimation (mean error = −0.14 m, RMSE = 0.30 m). Portable on-ground
scanning LIDAR provided images of individual trees with detailed features. Tree height and trunk diameter were estimated to
be within 0.31 m and 1 cm, respectively, from the on-ground LIDAR images. We combined airborne and on-ground LIDAR images
to overcome blind regions and created a complete three-dimensional model of three standing trees. The model allowed not only
visual assessment from all viewpoints but also quantitative estimation of canopy volume, trunk volume, and canopy cross-sectional
area. |
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Keywords: | Three-dimensional modeling FP-mode DEM DTM Composite remote sensing Scanning LIDAR Tree measurement Urban park Visual assessment |
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