Skip to contents

What is the class or spatial attributes of this feature?

Source: R/is_sf.R
is_sf.Rd

What is the class or spatial attributes of this feature?

Usage

is_sf(x, ext = FALSE, allow_null = FALSE, allow_list = FALSE)

is_sfg(x, allow_null = FALSE)

is_sfc(x, allow_null = FALSE)

is_bbox(x, allow_null = FALSE, allow_na = FALSE)

is_raster(x, allow_null = FALSE)

is_sp(x, allow_null = FALSE)

is_geo_coords(x, allow_null = FALSE)

Arguments

x

An sf, sfc, or bbox object.

ext

If TRUE, check if x is a sf, sfc, or bbox class object or not; defaults to FALSE. (used by is_sf)

allow_null

If TRUE and x is NULL, return TRUE; defaults to FALSE.

allow_list

If TRUE, is_sf will return TRUE if x is a list of sf objects.

allow_na

If TRUE, is_bbox() ignores any NA values. Defaults to FALSE.

Details

  • is_sf: is x a sf class object?

  • is_sfc: is x is a sfc class object?

  • is_bbox: is x is a bbox class object?

  • is_sf_list: is x is a list of sf class objects (with or without names)?

  • is_raster: is x a Raster class object?

  • is_sp: is x a Spatial class object of any type?

  • is_geo_coords: is x likely a geodetic coordinate pair (a length 2 numeric vector, with a max absolute value less than or equal to 180)?

  • is_wgs84: is x using the WSG84 coordinate reference system?

Examples

nc <- sf::read_sf(system.file("shape/nc.shp", package = "sf"))

is_sf(nc)
#> [1] TRUE

is_sfc(nc$geometry)
#> [1] TRUE

is_sf_list(list(nc[1, ], nc[2, ]))
#> [1] TRUE

is_bbox(sf::st_bbox(nc))
#> [1] TRUE

is_wgs84(sf::st_transform(nc, 4326))
#> [1] TRUE

is_same_crs(nc, 4267)
#> [1] TRUE