Create a stand map.

Creates a map of the forest stand where each tree is a point, sized relative to its most recent diameter at breast height (dbh) measurement. Trees for which dbh data is missing from dbh_data will be plotted in blue instead of the standard red and assigned a size equal to mean dbh in the stand. Points can optinally be labeled using a column included in map_data, such as tag numbers of the trees.

stand_map(map_data, dbh_data, x_limit, y_limit, labels = NULL)

Arguments

map_data	Data frame of tree coordinates. Must include the columns: tree_id, x_coord, and y_coord. If points (trees) are to be labeled in the plot, map_data must also contain a column containing the labels (e.g. tag numbers).
dbh_data	Data frame of tree measurement data. Must include the columns: tree_id, dbh, and year.
x_limit	Numeric vector of length two indicating the x coordinate range to be included.
y_limit	Numeric vector of length two indicating the y coordinate range to be included.
labels	Name of column in map_data containing labels for trees in the stem map, provided as a string. If labels argument is not provided, trees will not be labeled in the stem map.

Value

Stand map will be plotted in the plotting window.

Details

The x and y limits of the stand map can be specified because if a large stand (>50m in width or length) is mapped all at once the labels probably will not be readable.

Examples

library(dplyr)
# Isolate mapping and tree data for one stand
one_stand_map <- mapping %>%
  filter(stand_id == "AB08")
one_stand_tree <- tree %>%
  filter(stand_id == "AB08")

# Create map of one quarter of the stand using tag numbers as labels
stand_map(one_stand_map, one_stand_tree, c(50, 100), c(50, 100), "tag")