a5_cell_to_boundary: Get cell boundary polygons

In a5R: 'A5' Discrete Global Grid System

Get cell boundary polygons

Description

Returns the boundary of each cell as a wk::wkt() or wk::wkb() polygon geometry. Boundaries are pentagonal polygons on the WGS 84 ellipsoid.

Usage

a5_cell_to_boundary(
  cell,
  format = c("wkb", "wkt"),
  closed = TRUE,
  segments = NULL
)

Arguments

cell	An a5_cell vector.
format	Character scalar, either "wkb" (default) or "wkt".
closed	Logical scalar; if TRUE (default) the ring is closed (first vertex repeated at end).
segments	Integer scalar or NULL. Number of interpolation segments per edge for geodesic accuracy. NULL uses the default (straight edges).

Value

A wk_wkt or wk_wkb vector of polygon geometries with wk::wk_crs_longlat() CRS.

See Also

a5_cell_to_lonlat() for cell centroids.

Examples

cell <- a5_lonlat_to_cell(-3.19, 55.95, resolution = 5)
a5_cell_to_boundary(cell)
a5_cell_to_boundary(cell, format = "wkt")

a5R documentation built on March 26, 2026, 5:10 p.m.