calc_diam_plot_species: aggregate parameters by diameter class, plot, 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 diameter class, plot, tree species and year

Description

This function calculates for each plot, tree species, year and diameter class some values per hectare: number of stems, basal area and volume of standing trees (for coppice based on data on shoot level), and volume of logs (= lying deadwood).

Usage

calc_diam_plot_species(data_stems_calc, data_deadwood, plotinfo)

Arguments

data_stems_calc	dataframe on stem level measurements with variables plot_id, plottype, tree_measure_id, date_dendro, dbh_mm, height_m, species, alive_dead, decaystage, period, year, subcircle, plotarea_ha,... (output of function calc_variables_stem_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, dbh_class_5cm, 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_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_deadwood <- load_data_deadwood(path_to_fieldmapdb)
plotinfo <- load_plotinfo(path_to_fieldmapdb)
calc_diam_plot_species(data_stems_calc, data_deadwood, plotinfo)

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