Calculate toxic release covariates

Extract toxic release values at point locations. Returns a data.frame object containing locs_id and variables for each chemical in from.

Usage

calc_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

logical(1). Should the function return a SpatVector? Default is FALSE. The coordinate reference system of the SpatVector is that of from.

...

Placeholders.

Value

a data.frame or SpatVector object

Note

U.S. context.

See also

calc_sedc, process_tri

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)
calc_tri(
  from = tri, # derived from process_tri() example
  locs = loc,
  locs_id = "id",
  radius = c(1e3L, 1e4L, 5e4L)
)
} # }