Convert Points to LINESTRING Geometries — points_to

Converts a set of ordered point coordinates into one or more LINESTRING geometries. If a grouping variable is provided, one LINESTRING is created for each group.

Usage

points_to_line(data, long, lat, id_field = NULL, sort_field = NULL)

Arguments

data: A data frame containing point coordinates.
long: Character. Name of the longitude column.
lat: Character. Name of the latitude column.
id_field: Optional character. Name of the column used to group points into different LINESTRING geometries.
sort_field: Optional character. Name of the column used to order points before creating the LINESTRING geometries.

Value

If id_field is NULL, returns an sfc_LINESTRING object with CRS EPSG:4326.

If id_field is provided, returns an sf object containing one LINESTRING for each group and a column with the corresponding group identifier.

Examples

if (FALSE) { # \dontrun{
# trajectory must contain point coordinates
# and an identifier for each route

line <- points_to_line(
  data = trajectory,
  long = "long",
  lat = "lat",
  id_field = "alternative",
  sort_field = "ID"
)
} # }