nhdplusTools (version 1.3.2)

make_node_topology: 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)

Value

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

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.

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)