Navigate Upstream with Tributaries
Traverse NHDPlus network upstream with tributaries
get_UT(network, comid, distance = NULL)
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. |
integer vector of all COMIDs upstream with tributaries of the starting COMID.
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)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.