Skip to contents

Retrieve Hydrologic Unit Code (HUC) data

Source: R/process.R
process_huc.Rd

Retrieve Hydrologic Unit Code (HUC) data

Usage

process_huc(
  path,
  layer_name = NULL,
  huc_level = NULL,
  huc_header = NULL,
  extent = NULL,
  ...
)

Arguments

path

character. Path to the file or the directory containing HUC data.

layer_name

character(1). Layer name in the path

huc_level

character(1). Field name of HUC level

huc_header

character(1). The upper level HUC code header to extract lower level HUCs.

extent

numeric(4) or SpatExtent giving the extent of the raster if NULL (default), the entire raster is loaded

...

Arguments passed to nhdplusTools::get_huc()

Value

a SpatVector object

See also

nhdplusTools::get_huc

Author

Insang Song

Examples

## NOTE: Examples are wrapped in `\dontrun{}` as function requires a large
##       amount of data which is not included in the package.
if (FALSE) { # \dontrun{
library(terra)
getf <- "WBD_National_GDB.gdb"
# check the layer name to read
terra::vector_layers(getf)
test1 <- process_huc(
  getf,
  layer_name = "WBDHU8",
  huc_level = "huc8"
)
test2 <- process_huc(
  getf,
  layer_name = "WBDHU8",
  huc_level = "huc8"
)
test3 <- process_huc(
  "",
  layer_name = NULL,
  huc_level = NULL,
  huc_header = NULL,
  id = "030202",
  type = "huc06"
)
} # }