Add Watershed to Blue Line Key

Adds polygon (geometry) of aggregated fundamental watersheds to blue line key (blk). The rm distances which is in meters is from the river mouth.

fwa_add_watershed_to_blk(
  x,
  exclude = FALSE,
  epsg = getOption("fwa.epsg", 3005),
  nocache = getOption("fwa.nocache", FALSE)
)

Arguments

x

An sf object with a polygon sfc column specifying watersheds and an optional rm column specfying the river meter. The rm is set to be 0 if missing.

exclude

A logical vector specifying whether to exclude the fundamental watershed in which the start falls.

epsg

A positive whole number of the epsg to transform features to.

nocache

A flag specifying whether or not to cache results.

Value

An sf tibble with the columns of x plus sf column geometry.

A sf object

See also

fwa_watershed_at_measure.

Examples

if (FALSE) {
fwa_add_watershed_to_blk(data.frame(blk = 356308001))
}