Relative volume ratio TreeQSM — relative_volume_ratio

Calculates the relative volume ratio from a TreeQSM.

Usage

relative_volume_ratio_qsm(cylinder, treedata)

Arguments

cylinder: Cylinder field of a TreeQSM that is returned by read_tree_qsm.
treedata: Treedata field of a TreeQSM that is returned by read_tree_qsm.

Value

The relative volume ratio.

Details

The relative volume ratio is defined as "Ratio of the percentage volume within 80 to 90% of the tree height and the percentage volume within 0 to 10% of the tree height" (Terryn et al., 2020).

References

Terryn, L., Calders, K., Disney, M., Origo, N., Malhi, Y., Newnham, G., ... & Verbeeck, H. (2020). Tree species classification using structural features derived from terrestrial laser scanning. ISPRS Journal of Photogrammetry and Remote Sensing, 168, 170-181.

Examples

if (FALSE) {
# Read tree qsm and calculate the relative volume ratio
qsm <- read_tree_qsm(QSM_path = "path/to/qsm.mat")
rvr <- relative_volume_ratio_qsm(
  cylinder = qsm$cylinder,
  treedata = qsm$treedata
)
}