get_UT: Navigate Upstream with Tributaries
In nhdplusTools: NHDPlus Tools

get_UT

R Documentation

Navigate Upstream with Tributaries

Description

Traverse NHDPlus network upstream with tributaries

Usage

get_UT(network, comid, distance = NULL)

Arguments

`network`	data.frame NHDPlus flowlines including at a minimum: COMID, Pathlength, LENGTHKM, and Hydroseq.
`comid`	integer Identifier to start navigating from.
`distance`	numeric distance in km to limit how many COMIDs are returned. The COMID that exceeds the distance specified is returned.

Value

integer vector of all COMIDs upstream with tributaries of the starting COMID.

Examples

library(sf)
source(system.file("extdata", "sample_flines.R", package = "nhdplusTools"))
plot(sample_flines$geom)
start_COMID <- 11690196
UT_COMIDs <- get_UT(sample_flines, start_COMID)
plot(dplyr::filter(sample_flines, COMID %in% UT_COMIDs)$geom,
     col = "red", add = TRUE)

UT_COMIDs <- get_UT(sample_flines, start_COMID, distance = 50)
plot(dplyr::filter(sample_flines, COMID %in% UT_COMIDs)$geom,
     col = "blue", add = TRUE)

nhdplusTools documentation built on Oct. 2, 2023, 5:06 p.m.