single_tree_analysis: Computes the 3d alpha shape, volume, surface area, and...

In spatial-mk/tre3d: Antarctic Pinguin Measurements

Description

computes the 2d alpha shape, 2d convex hull a 3D set of points as well as ground diameter and diameter at breast height
To avoid collinearity a small random jitter is added to the points before alpha-shape computation.

Usage

single_tree_analysis(
  input_cloud = data.frame(x = runif(20), y = runif(20), z = runif(20)),
  vox = FALSE,
  voxel_size = 0.03,
  alpha_value = 1,
  plot = FALSE,
  plot_hulls = FALSE,
  overwrite_output = FALSE
)

Arguments

input_cloud	A file or data.frame containing a tree point cloud with x y z. If file, it assumes first three columns to be x y z without header. Futher columns are ignored.
vox	Should the input point cloud be reduced to voxel grid for faster computation. Default to TRUE.
voxel_size	Size (in meters) of the voxels when vox==TRUE. Default 0.03
alpha_value	Alpha value. Default 1.0
plot	Should the 2d alpha shape be plotted. Default to FALSE.
plot_hulls	Should the CPA and slice hull be plotted. Default to FALSE.
overwrite_output	Should outout files be overwritten?. Logical. Default FALSE.

Value

A .txt files containing: CPA, CH, Height, GD, DBH, etc.

Author(s)

Matthias Kunz, last updated: 26.11.2019

Examples

get_3d_alpha_shape(data.frame(x=runif(20),y=runif(20), z=runif(20)), alpha=1.0)

spatial-mk/tre3d documentation built on April 1, 2020, 5:26 p.m.