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Add sf coordinates and crs as columns

Source: R/extract_sf_coords.R
extract_sf_coords.Rd

extract_sf_coords adds the x and y coordinates and the crs as additional columns to an sf object, with the option to convert it to a data.frame.

Usage

extract_sf_coords(sf_obj, keep_sf = TRUE, add_crs = TRUE)

Arguments

sf_obj

An object of class sf, typically created by sf::st_as_sf()

keep_sf

A logical value indicating if the return object should remain an sf object or be converted to a data.frame

add_crs

A logical value indicating if the crs should be added as a column

Value

If keep_sf is:

  • TRUE sf_obj with two additional numeric columns (x and y) and a character column (crs).

  • FALSE: same as above, but converted to a data.frame

Examples

cities <- data.frame(
  name = c("Nanaimo", "Port Moody", "Prince George"),
  x = c(-124.0531, -122.8519, -122.7949),
  y = c(49.1633, 49.2844, 53.8934)
)
cities_sf <- cities |>
  sf::st_as_sf(coords = c("x", "y"), crs = "WGS84")
cities_sf |>
  extract_sf_coords()
#> Simple feature collection with 3 features and 4 fields
#> Geometry type: POINT
#> Dimension:     XY
#> Bounding box:  xmin: -124.0531 ymin: 49.1633 xmax: -122.7949 ymax: 53.8934
#> Geodetic CRS:  WGS 84
#>            name                  geometry         x       y   crs
#> 1       Nanaimo POINT (-124.0531 49.1633) -124.0531 49.1633 WGS84
#> 2    Port Moody POINT (-122.8519 49.2844) -122.8519 49.2844 WGS84
#> 3 Prince George POINT (-122.7949 53.8934) -122.7949 53.8934 WGS84