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Arbitrary geometry as insets

Source: R/inset_shape_sf.R
shape_sf.Rd

You can use any polygon to define the shape of the inset, including a feature from your base map layer.

Usage

shape_sf(geometry)

Arguments

geometry

A simple features geometry that is either a polygon or multipolygon, and is valid and simple.

Value

A shape definition suitable for use with configure_inset().

See also

configure_inset()

Other shapes: shape_circle(), shape_rectangle()

Examples

library(ggplot2)
nc <- sf::st_read(system.file("shape/nc.shp", package = "sf"), quiet = TRUE)
make_demo <- function(...) {
  ggplot(nc) +
    geom_sf(fill = "grey95", colour = "grey85") +
    # For a filled frame, we want to interleave it between the base layer
    # (above this line) and the target layer (below the following line).
    geom_inset_frame(target.aes = list(fill = "white")) +
    geom_sf_inset(map_base = "none", colour = NA) +
    coord_sf_inset(inset = configure_inset(...)) +
    theme_void()
}
shape <- shape_sf(nc[21,])

make_demo(shape, scale = 6, translation = c(-200, -200))

make_demo(shape, scale = 6, translation = c(-100, -100))

make_demo(shape, scale = 6, translation = c(100, 100))

make_demo(shape, scale = 0.5, translation = c(0, 0))