Generate Regularly Spaced Points Inside Polygons

This function generates a regularly spaced grid of points inside each polygon in a given sf object and assigns it an ID. The point density is determined by a specified column.

Usage

ngr_spk_poly_to_points(sf_in, col_density, col_id = NULL)

Arguments

sf_in

An sf object containing polygon geometries.

col_density

character The name of the column containing point density values per polygon.

col_id

character or NULL The name of the column to use as the ID. Defaults to "id" if NULL.

Value

An sf object containing the generated points with an ID column.

See also

Other spacehakr: ngr_spk_ext_raster(), ngr_spk_gdalwarp(), ngr_spk_odm(), ngr_spk_res()

Examples

poly <- sf::st_sf(
  region = c("A", "B"),
  col_density = c(1, 5),
  geometry = sf::st_sfc(
    sf::st_polygon(list(rbind(c(0, 0), c(10, 0), c(10, 10), c(0, 10), c(0, 0)))),
    sf::st_polygon(list(rbind(c(15, 15), c(20, 15), c(20, 20), c(15, 20), c(15, 15))))
  )
)

points <- ngr_spk_poly_to_points(poly, col_density = "col_density", col_id = "region")

plot(sf::st_geometry(poly))
 plot(sf::st_geometry(points), add = TRUE, col = "red", pch = 16)