calculate_prism: Calculate PRISM covariates

In amadeus: Accessing and Analyzing Large-Scale Environmental Data

Calculate PRISM covariates

Description

Extract PRISM values at point locations. Returns a data.frame object containing locs_id and PRISM variable. PRISM variable column name reflects the PRISM variable and circular buffer radius.

Usage

calculate_prism(from, locs, locs_id = "site_id", radius = 0, geom = FALSE, ...)

Arguments

from	SpatRaster(1). Output from process_prism().
locs	data.frame. character to file path, SpatVector, or sf object.
locs_id	character(1). Column within locations CSV file containing identifier for each unique coordinate location.
radius	integer(1). Circular buffer distance around site locations. (Default = 0).
geom	FALSE/"sf"/"terra".. Should the function return with geometry? Default is FALSE, options with geometry are "sf" or "terra". The coordinate reference system of the sf or SpatVector is that of from.
...	Placeholders.

Value

a data.frame or SpatVector object

Author(s)

Insang Song

See Also

process_prism()

Examples

## NOTE: Example is wrapped in `\dontrun{}` as function requires a large
##       amount of data which is not included in the package.
## Not run: 
loc <- data.frame(id = "001", lon = -78.90, lat = 35.97)
calculate_prism(
  from = prism, # derived from process_prism() example
  locs = loc,
  locs_id = "id",
  radius = 0,
  geom = FALSE
)

## End(Not run)

amadeus documentation built on Jan. 27, 2026, 1:07 a.m.