Spatial Reference System

st_set_crs(x, value)

st_setsrid(x, value)

Arguments

x	numeric, character, or object of class sf or sfc
value	one of (i) character: a valid proj4string (ii) integer, a valid EPSG value (numeric), or (iii) a list containing named elements `proj4string` (character) and/or `epsg` (integer) with (i) and (ii).

st_setsrid is postgis compatible