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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,
recompute_bbox = FALSE
)an object of class sfc, which is a classed list-column with simple feature geometries.
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.
coordinate reference system: integer with the EPSG code, or character with proj4string
numeric; see st_as_binary
see st_read
character; if this function is called without valid geometries, this argument may carry the right dimension to set empty geometries
logical; use TRUE to force recomputation of the bounding box
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.
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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