Create simple feature geometry list column
Create simple feature geometry list column, set class, and add coordinate reference system and precision
st_sfc(..., crs = NA_crs_, precision = 0, check_ring_dir = FALSE, dim)
... |
zero or more simple feature geometries (objects of class |
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 |
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.
an object of class sfc, which is a classed list-column with simple feature geometries.
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))
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