calc_dendro_plot_species: aggregate parameters by plot and tree species

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

aggregate parameters by plot and tree species

Description

This function calculates for each plot, tree species and year some values per hectare: number of trees, basal area and volume.

Usage

calc_dendro_plot_species(data_dendro_calc, data_deadwood, plotinfo)

Arguments

data_dendro_calc	dataframe on tree measures with variables plot_id, plottype, tree_measure_id, date_dendro, dbh_mm, height_m, species, alive_dead, decaystage, vol_tot_m3, basal_area_m2, period, old_id, year, subcircle, plotarea_ha,... (output of function calc_variables_tree_level())
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())
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

dataframe with columns plot, year, tree_species, number_of_trees_ha, basal_area_m2_ha, volume_m3_ha

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_shoots <- load_data_shoots(path_to_fieldmapdb)
data_deadwood <- load_data_deadwood(path_to_fieldmapdb)
data_stems <- compose_stem_data(data_dendro, data_shoots)
# omit argument 'example_dataset = TRUE' below to use all height models
height_model <- load_height_models(example_dataset = TRUE)
data_stems_calc <- calc_variables_stem_level(data_stems, height_model)
data_dendro_calc <- calc_variables_tree_level(data_dendro, data_stems_calc)
plotinfo <- load_plotinfo(path_to_fieldmapdb)
calc_dendro_plot_species(data_dendro_calc, data_deadwood, plotinfo)

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