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 )
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
character; if this function is called without valid geometries, this argument may carry the right dimension to set empty geometries
TRUE to force recomputation of the bounding box
an object of class
sfc, which is a classed list-column with simple feature 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