make_node_topology: get node topology from edge topology (DEPRECATED)

In nhdplusTools: NHDPlus Tools

get node topology from edge topology (DEPRECATED)

Description

creates a node topology table from an edge topology

Usage

make_node_topology(x, add_div = NULL, add = TRUE)

Arguments

x	data.frame with an identifier and to identifier in the first and second columns.
add_div	data.frame containing id and toid diverted paths to add. Should have id and toid fields in the first and second columns. Names are not used.
add	logical if TRUE, a tocomid column will be added, otherwise a data.frame with two columns will be returned.

Value

data.frame containing id, fromnode, and tonode attributes or all attributes provided with id, fromnode and tonode in the first three columns.

Examples

source(system.file("extdata/new_hope_data.R", package = "nhdplusTools"))

x <- dplyr::select(get_tocomid(
  dplyr::select(new_hope_flowline, COMID, FromNode, ToNode, Divergence, FTYPE,
                AreaSqKM, LENGTHKM, GNIS_ID)
), -tonode, -fromnode)

head(y <- make_node_topology(x))

# just the divergences which have unique fromids in x but don't in new hope.
div <- get_tocomid(dplyr::select(new_hope_flowline, COMID, FromNode, ToNode),
                   return_dendritic = FALSE,
                   remove_coastal = FALSE)
div <- div[div$tocomid %in%
             new_hope_flowline$COMID[new_hope_flowline$Divergence == 2],]

y <- make_node_topology(x, div)

nhdplusTools documentation built on June 22, 2024, 10:36 a.m.