get_DM: Navigate Downstream Mainstem

In nhdplusTools: NHDPlus Tools

Navigate Downstream Mainstem

Description

Traverse NHDPlus network downstream main stem

Usage

get_DM(network, comid, distance = NULL, sort = FALSE, include = TRUE)

Arguments

network	data.frame NHDPlus flowlines including at a minimum: COMID, LENGTHKM, DnHydroseq, 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.
sort	if TRUE, the returned COMID vector will be sorted in order of distance from the input COMID (nearest to farthest)
include	if TRUE, the input COMID will be included in the returned COMID vector

Value

integer vector of all COMIDs downstream of the starting COMID along the mainstem

nhdplusTools documentation built on Sept. 2, 2026, 9:07 a.m.