stem_branch_angle_qsm: Stem branch angle TreeQSM

In lmterryn/ITSMe: Individual Tree Structural Metrics

Stem branch angle TreeQSM

Description

Calculates the stem branch angle from a TreeQSM.

Usage

stem_branch_angle_qsm(branch)

Arguments

branch

Branch field of a TreeQSM that is returned by read_tree_qsm.

Details

The stem branch angle is defined as "the median of the branching angles of the 1st order branches in degrees. 0 is upwards and 180 downwards (parallel with the trunk)" (Akerblom et al., 2017 & Terryn et al., 2020).

Value

The stem branch angle in degrees. NaN when there are no stem branches.

References

Akerblom, M., Raumonen, P., Makipaa, R., & Kaasalainen, M. (2017). Automatic tree species recognition with quantitative structure models. Remote Sensing of Environment, 191, 1-12.

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

## Not run: 
# Read tree qsm and calculate the stem branch angle
qsm <- read_tree_qsm(QSM_path = "path/to/qsm.mat")
sba <- stem_branch_angle_qsm(branch = qsm$branch)

## End(Not run)

lmterryn/ITSMe documentation built on Feb. 4, 2025, 2:21 a.m.