R: Create simple feature geometry list column

sfc {sf} | R 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))

[Package sf version 0.9-7 Index]