World of Knowledge (Australia) - - World Events -

Most beams of light re­flect off the tree cover, but some pen­e­trate the thick fo­liage, reach the ground and are then re­flected back through gaps in the canopy. Record­ing how long it takes the light to re­turn to the de­vice pro­duces a ‘point cloud’. From this, a 3D model of the for­est canopy is cre­ated.

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