Throwing Shade: A Fallen Tree Canopy 3D Reconstruction

3D Forensic Engineering Animation

Laurence R. Penn, CFVT, Senior Forensic Animation/Video Specialist

When a tree fell on a roadway, injuring a passer-by, DJS was tasked with analyzing the evidence to provide opinions on the measurements of the tree and extent of its canopy, including proximity to utility lines, prior to the incident.

A video from the scene and photographs of the property were provided for analysis. A scan of the site was performed by DJS field investigators, capturing high density LIDAR measurements. Using LIDAR assisted photogrammetry of the images and data provided from an arborist report, the position and angle of the tree were modeled in 3D. Major branches visible in the photos were also modeled to establish a canopy radius. 

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