crown_metrics: Crown metrics.

In spatial-mk/tre3d: Antarctic Pinguin Measurements

Description

Computation of tree crown metrics.
Currrently implemented: height, cbh, cpa cr_length, cr_length_to_heigh, cr_sinuosity, cr_compactnes, cr_density, cr_gini, cr_volume, cr_area cr_displacement

Usage

crown_metrics(
  input_cloud = "*.xyz",
  slice_thickness = 0.3,
  cbh = 0,
  vox = TRUE,
  voxel_size = 0.03,
  use_concave_hull = FALSE,
  alpha_value = 1,
  plot_hulls = FALSE,
  pos_x = NA,
  pos_y = NA
)

Arguments

input_cloud	A 3D point cloud file, e.g. "tree1.xyz". Assumes first three columns to be x y z without header. Futher columns are ignored.
slice_thickness	Thickness of vertical slices in meter. Default 0.3
cbh	Crown base height in meter. Default 0.0
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
use_concave_hull	Should slices be modelled as concave hulls instead of convex hull. Default to FALSE.
alpha_value	Alpha value when use_convace_hull==TRUE. Default 1.0
plot_hulls	Should the CPA and slice hull be plotted. Default to FALSE.
pos_x	X coordinate of tree position. Default NA
pos_y	Y coordinate of tree position. Default NA

Value

A data.frame with tree parameters

Author(s)

Matthias Kunz, last updated: 27.04.2019

Examples

crown_metrics("tree1.xyz", 0.25)
crown_metrics("tree1.xyz", 0.3, CBHfromQSM("tree1_qsm.txt"), 0.025)

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