nhdplusTools (version 1.3.2)

get_nhdplushr: Get NHDPlus HiRes

Description

Get NHDPlus HiRes

Usage

get_nhdplushr(
  hr_dir,
  out_gpkg = NULL,
  layers = c("NHDFlowline", "NHDPlusCatchment"),
  pattern = ".*GDB.gdb$",
  check_terminals = TRUE,
  overwrite = FALSE,
  keep_cols = NULL,
  ...
)

Value

sf data.frames containing output that may also be written to a geopackage for later use.

Arguments

hr_dir

character directory with geodatabases (gdb search is recursive)

out_gpkg

character path to write output geopackage

layers

character vector with desired layers to return. c("NHDFlowline", "NHDPlusCatchment") is default. Choose from: c("NHDFlowline", "NHDPlusCatchment", "NHDWaterbody", "NHDArea", "NHDLine", "NHDPlusSink", "NHDPlusWall", "NHDPoint", "NHDPlusBurnWaterbody", "NHDPlusBurnLineEvent", "HYDRO_NET_Junctions", "WBDHU2", "WBDHU4","WBDHU6", "WBDHU8" "WBDHU10", "WBDHU12", "WBDLine") Set to NULL to get all available.

pattern

character optional regex to select certain files in hr_dir

check_terminals

boolean if TRUE, run make_standalone on output.

overwrite

boolean should the output overwrite? If false and the output layer exists, it will be read and returned so this function will always return data even if called a second time for the same output. This is useful for workflows. Note that this will NOT delete the entire Geopackage. It will overwrite on a per layer basis.

keep_cols

character vector of column names to keep in the output. If NULL, all will be kept.

...

parameters passed along to get_hr_data for "NHDFlowline" layers.

Details

NHDFlowline is joined to value added attributes prior to being returned. Names are not modified from the NHDPlusHR geodatabase. Set layers to "NULL" to get all layers.

Examples

if (FALSE) {
# Note this will download a lot of data to a temp directory.
# Change 'temp_dir' to your directory of choice.
temp_dir <- file.path(nhdplusTools_data_dir(), "temp_hr_cache")

download_dir <- download_nhdplushr(temp_dir, c("0302", "0303"))

get_nhdplushr(download_dir, file.path(download_dir, "nhdplus_0302-03.gpkg"))

get_nhdplushr(download_dir,
              file.path(download_dir, "nhdplus_0302-03.gpkg"),
              layers = NULL, overwrite = TRUE)

get_nhdplushr(download_dir,
              file.path(download_dir, "nhdplus_0302-03.gpkg"),
              layers = "NHDFlowline", overwrite = TRUE,
              min_size_sqkm = 10, simp = 10, proj = "+init=epsg:5070")

# Cleanup
unlink(temp_dir, recursive = TRUE)

}