extract_dist {quaxnat}

Extracting distances to nearest seed source for point data

Description

Extracts a distance for the inventory plots. The distance to the nearest seed source is used for the analysis of the regeneration potential.

Usage

extract_dist(raster, geom, species)

Arguments

raster

Raster dataset with tree species classification of specific tree species and tree species groups.

geom

Geodata representing the study area. This can be a polygon or point dataset. This describes the outer boundary of the study area. A buffer of 1000 m is placed around the Bounding box to possibly take into account seed trees outside the study area.

species

Represents the numerical value by which the tree species of interest was encoded in the raster dataset.

Value

Numeric vector with distances of every inventory plot to the nearest seed source of a specific tree species.

Examples

## Create raster data set
set.seed(2023)
rr <- terra::rast(
matrix(sample(0:10, 20 * 20, replace = TRUE),
        nrow = 20, ncol = 20))

## Create vector data set
vec <- terra::vect(rbind(c(5,10), c(5,15)))

## Extract distance for the inventory plot
extract_dist(raster=rr, geom=vec, species=10)