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Get cell boundary polygons

Source: R/boundary.R
a5_cell_to_boundary.Rd

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)
#> <wk_wkb[1] with CRS=OGC:CRS84>
#> [1] <POLYGON ((-4.490769 56.63193, -4.575103 55.93184, -4.654266 55.23196, -3.592316 55.41531, -2.521971 55.5901, -2.031558 56.23106...>
a5_cell_to_boundary(cell, format = "wkt")
#> <wk_wkt[1] with CRS=OGC:CRS84>
#> [1] POLYGON ((-4.490769 56.63193, -4.575103 55.93184, -4.654266 55.23196, -3.592316 55.41531, -2.521971 55.5901, -2.031558 56.23106...