Returns the tree height.
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.
Examples
if (FALSE) {
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)
}