sfc: Create simple feature geometry list column

sfcR Documentation

Create simple feature geometry list column

Description

Create simple feature geometry list column, set class, and add coordinate reference system and precision

Usage

st_sfc(..., crs = NA_crs_, precision = 0, check_ring_dir = FALSE, dim)

Arguments

...

zero or more simple feature geometries (objects of class sfg), or a single list of such objects; NULL values will get replaced by empty geometries.

crs

coordinate reference system: integer with the EPSG code, or character with proj4string

precision

numeric; see st_as_binary

check_ring_dir

see st_read

dim

character; if this function is called without valid geometries, this argument may carry the right dimension to set empty geometries

Details

A simple feature geometry list-column is a list of class c("stc_TYPE", "sfc") which most often contains objects of identical type; in case of a mix of types or an empty set, TYPE is set to the superclass GEOMETRY.

Value

an object of class sfc, which is a classed list-column with simple feature geometries.

Examples

pt1 = st_point(c(0,1))
pt2 = st_point(c(1,1))
(sfc = st_sfc(pt1, pt2))
d = st_sf(data.frame(a=1:2, geom=sfc))

sf documentation built on March 18, 2022, 5:22 p.m.