plot_enrico

This dataset contains plot-level data from the Enrico-project from 16 mixed
forest stands in Lower Saxony, Germany.

datasets

Maps of the 'area potentially available' (APA) of trees is calculated from
mapped forest stands using the approach from Gspaltl et al. (2012) <doi:10.1093/forestry/cps052>.
This is done by computing a rasterized version of
'weighted voronoi diagrams' using a an approximation of the trees competitive
ability (e.g., crown radius, leaf area) as weight. The main output are 'Raster*'-
objects from the 'raster' package that are stored together with the raw data in
apa_list's, the main class of the 'APAtree' package. Aggregation functions are
provided to calculate stand characteristics based on APA-maps such as relative
proportions according to APA-size and the neighborhood diversity index NDiv
(Glatthorn (2021) <doi:10.1016/j.ecolind.2021.108073>).

Jonas Glatthorn

APAtree

Computation of the 'Area Potentially Available' (APA) to Trees

plot_enrico function

A <code>data.frame</code> of 16 plots. Plot coordinates are stored as
'simple feature column' (see the <code><a rd-options="sf:sf" href="/link/sf?package=APAtree&version=1.0.1&to=sf%3Asf" data-mini-rdoc="sf:sf::sf">sf</a></code>-package for more details):<dl class="dl-horizontal"><dt>id_plot</dt><dd>Unique plot id's.</dd><dt>border_geometry</dt><dd>A <code>sfc_POLYGON</code>-column specifying the
coordinates of the plot border relative to the plot center.</dd><dt>buffer_geometry</dt><dd>A <code>sfc_POLYGON</code>-column specifying the
coordinates of the plot buffer (10 m distance from <code>boder_geometry</code>)
relative to the plot center.</dd>
</dl>

plot_enrico: Plot-level data of 16 forest stands in Lower Saxony, Germany

Description

Usage

Arguments

Format

References