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Fast linestring union by ID

Source: R/utils.R
union_linestrings.Rd

Fast union/merge of lines by grouping column, using `terra`'s `aggregate()` and returning an `sf` layer. Final conversion to clean LINESTRINGs is delegated to an internal helper `flowpaths_to_linestrings()`.

Usage

union_linestrings(lines, ID)

Arguments

lines

An `sf` LINESTRING/MULTILINESTRING object with an attribute column used for grouping.

ID

A string naming the column over which to union geometries.

Value

An `sf` lines layer unioned by `ID` (column preserved). Output is normalized to clean LINESTRINGs via [flowpaths_to_linestrings()].

See also

[flowpaths_to_linestrings()], [union_polygons()]

Examples

if (FALSE) { # \dontrun{
out <- union_linestrings(flow_sf, "group_id")
} # }