Calculate toxic release covariates

Calculate toxic release values for polygons or isotropic buffer point locations. Returns a data.frame object containing locs_id and variables for each chemical in from.

Usage

calculate_tri(
  from = NULL,
  locs,
  locs_id = "site_id",
  radius = c(1000L, 10000L, 50000L),
  geom = FALSE,
  ...
)

Arguments

from: SpatVector(1). Output of process_tri().
locs: sf/SpatVector. Locations where TRI variables are calculated.
locs_id: character(1). Unique site identifier column name. Default is "site_id".
radius: Circular buffer radius. Default is c(1000, 10000, 50000) (meters)
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

Note

U.S. context.

Author

Insang Song, Mariana Kassien

Examples

## NOTE: Example is wrapped in `\dontrun{}` as function requires a large
##       amount of data which is not included in the package.
if (FALSE) { # \dontrun{
loc <- data.frame(id = "001", lon = -78.90, lat = 35.97)
calculate_tri(
  from = tri, # derived from process_tri() example
  locs = loc,
  locs_id = "id",
  radius = c(1e3L, 1e4L, 5e4L)
)
} # }