sfc: Create simple feature geometry list column

In sf: Simple Features for R

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,
  recompute_bbox = FALSE
)

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
recompute_bbox	logical; use TRUE to force recomputation of the bounding box

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 July 26, 2023, 5:22 p.m.