Prep NHDPlus Data
Function to prep NHDPlus data for use by nhdplusTools functions
prepare_nhdplus( flines, min_network_size, min_path_length, min_path_size = 0, purge_non_dendritic = TRUE, warn = TRUE, error = TRUE, skip_toCOMID = FALSE )
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 |
boolean Should non dendritic paths be removed or not. |
warn |
boolean controls whether warning an status messages are printed |
error |
boolean controls whether to return potentially invalid data with a warning rather than an error |
skip_toCOMID |
boolean if TRUE, toCOMID will not be added to output. |
data.frame ready to be used with the refactor_flowlines function.
source(system.file("extdata", "sample_flines.R", package = "nhdplusTools"))
prepare_nhdplus(sample_flines,
min_network_size = 10,
min_path_length = 1,
warn = FALSE)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.