New Zealand Journal of Forestry Science

Table 4 Variation in pulse densities required to obtain the maximum coefficient of determination (max. R ² ), the threshold R ² and 95% of the maximum R ² (95% max. R ² ) for mean top height ( H _m ), volume ( V ) and mean diameter at breast height ( D )

From: The influence of LiDAR pulse density on the precision of inventory metrics in young unthinned Douglas-fir stands during initial and subsequent LiDAR acquisitions

Stand metric	Culled DTM			DTM at 10 pulses m⁻²
	R²max.	R²threshold.	95%R²max.	R²max.	R²threshold.	95%R²max.
H _m	4	2	0.9	0.3	0.2	0.06
V	10	3	1	10	0.2	0.1
D	10	2	0.7	0.3	0.04	0.04

Simulations are shown where the DTM was culled and held at a pulse density of 10 pulses m⁻² throughout the culling process.

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