normalize_pc: Normalize a tree point cloud

In lmterryn/ITSMe: Individual Tree Structural Metrics

Normalize a tree point cloud

Description

Normalizes a tree point cloud by subtracting from each column its respective the min value (e.g. all X-values - min(all X-values)). 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 the correct normalized height of the tree.

Usage

normalize_pc(pc, dtm = NA, r = 5)

Arguments

pc	The tree point cloud as a data.frame with columns X,Y,Z. Output of read_tree_pc.
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.
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.

Value

Normalized point cloud as a data.frame with columns X,Y,Z.

Examples

## Not run: 
# Read tree point cloud and normalise the point cloud
pc_tree <- read_tree_pc(PC_path = "path/to/point_cloud.txt")
pc_norm <- normalize_pc(pc)

## End(Not run)

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