tree_height: Tree height

In lmterryn/ITSMe: Individual Tree Structural Metrics

Tree height

Description

Returns the tree height.

Usage

tree_height(treedata, pc = NA, dtm = NA, r = 5)

Arguments

treedata	Treedata field of a TreeQSM that is returned by read_tree_qsm.
pc	The tree point cloud as a data.frame with columns X,Y,Z. Output of read_tree_pc. If the point cloud is not available NA is used as input (default=NA).
dtm	The digital terrain model as a data.frame with columns X,Y,Z (default = NA). If the digital terrain model is in the same format as a point cloud it can also be read with read_tree_pc. only relevant when a point cloud is provided.
r	Numeric value (default=5) r which determines the range taken for the dtm. Should be at least the resolution of the dtm. Only relevant when a dtm is provided.

Details

If the tree point cloud is available the tree_height calculation is based on the point cloud (most accurate) with tree_height_pc. If the tree point cloud is not available the tree height is based on the treeQSM with tree_height_qsm. When the bottom of the point cloud is incomplete or obstructed you can choose to add a digital terrain model as an input which is used to estimate lowest point of the point cloud in order to obtain slices at the correct height of the tree.

Value

The tree height in meters.

Examples

## Not run: 
qsm <- read_tree_qsm(QSM_path = "path/to/qsm.mat")
h <- tree_height(treedata = qsm$treedata)
pc_tree <- read_tree_pc(PC_path = "path/to/point_cloud.txt")
h <- tree_height(treedata = qsm$treedata, pc = pc_tree)

## End(Not run)

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