INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values (6647, 'EPSG', 6647, '+vunits=m +no_defs +type=crs', 'VERT_CS["CGVD2013(CGG2013) height",VERT_DATUM["Canadian Geodetic Vertical Datum of 2013 (CGG2013)",2005,AUTHORITY["EPSG","1127"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","6647"]]');