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canopy height model

Why Multi-Return LiDAR is Essential for Accurate Forest DEMs

Multi-return LiDAR forestry applications depend on a deceptively simple principle: a single laser pulse can produce multiple distinct echoes as it travels through a forest canopy. The laser doesn’t pass through leaves — it passes through the gaps between them. As the NOAA Office for Coastal Management explains, “the ability of LiDAR to ‘see through’ […]

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