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
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