Prep NHDPlus Data — prepare_nhdplus • hydrogeofetch

Function to prep NHDPlus data for use by hydrogeofetch functions

prepare_nhdplus(
  flines,
  min_network_size = 0,
  min_path_length = 0,
  min_path_size = 0,
  purge_non_dendritic = TRUE,
  warn = TRUE,
  error = TRUE,
  skip_toCOMID = FALSE,
  align_names = TRUE
)

Arguments

flines: data.frame NHDPlus flowlines including: COMID, LENGTHKM, FTYPE (or FCODE), TerminalFl, FromNode, ToNode, TotDASqKM, StartFlag, StreamOrde, StreamCalc, TerminalPa, Pathlength, and Divergence variables.
min_network_size: numeric Minimum size (sqkm) of drainage network to include in output.
min_path_length: numeric Minimum length (km) of terminal level path of a network.
min_path_size: numeric Minimum size (sqkm) of outlet level path of a drainage basin. Drainage basins with an outlet drainage area smaller than this will be removed.
purge_non_dendritic: logical Should non dendritic paths be removed or not.
warn: logical controls whether warning an status messages are printed
error: logical controls whether to return potentially invalid data with a warning rather than an error
skip_toCOMID: logical if TRUE, toCOMID will not be added to output.
align_names: logical

Value

data.frame with prepared NHDPlus network attributes.