calculate_dendrometry: Calculates and aggregates parameters on dendrometry of trees

In inbo/forrescalc: Calculation of Aggregated Values on Dendrometry, Regeneration and Vegetation of Forests, Starting from Individual Tree Measures from Fieldmap

Calculates and aggregates parameters on dendrometry of trees

Description

This function calculates additional variables and makes aggregations of individual tree measures on the levels of

• plot and year

• plot, tree species and year

• diameter class, plot and year

• diameter class, plot, tree species and year

and it makes aggregations of volume data on logs on the levels of

• decay stage, plot and year

• decay stage, plot, tree species and year

Usage

calculate_dendrometry(
  data_dendro,
  data_deadwood,
  data_shoots,
  height_model,
  plotinfo
)

Arguments

data_dendro	dataframe on tree measures with variables plot_id, plottype, tree_measure_id, date_dendro, dbh_mm, height_m, species, alive_dead, decaystage, period, old_id, year, subcircle, plotarea_ha,... (output of function load_data_dendrometry())
data_deadwood	dataframe on logs with variables plot_id, plottype, date_dendro, species, decaystage, calc_volume_m3, period and year (output of function load_data_deadwood())
data_shoots	dataframe on shoots as given from the function load_data_shoots()
height_model	dataframe with model containing 'exp' or 'ln', coefficients P1 and P2 to calculate height model for each combination of species, forest_reserve, period and plottype. Height models in .xlsx generated by Fieldmap can be grouped in a dataframe using function load_height_models()
plotinfo	dataframe on surveyed plots with variables plot_id, plottype, forest_reserve, survey_trees, survey_deadw, period and year_dendro (output of function load_plotinfo())

Value

List of dataframes that are mentioned in the above description

Examples

library(forrescalc)
# (add path to your own fieldmap database here)
path_to_fieldmapdb <-
  system.file("example/database/mdb_bosres.sqlite", package = "forrescalc")

data_dendro <- load_data_dendrometry(path_to_fieldmapdb)
data_deadwood <- load_data_deadwood(path_to_fieldmapdb)
data_shoots <- load_data_shoots(path_to_fieldmapdb)
# omit argument 'example_dataset = TRUE' below to use all height models
height_model <- load_height_models(example_dataset = TRUE)
plotinfo <- load_plotinfo(path_to_fieldmapdb)
calculate_dendrometry(
  data_dendro, data_deadwood, data_shoots, height_model, plotinfo)

inbo/forrescalc documentation built on Sept. 28, 2024, 11:45 a.m.