INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values (6639, 'EPSG', 6639, '+vunits=m +no_defs +type=crs', 'VERT_CS["Guam 1963 height",VERT_DATUM["Guam Vertical Datum of 1963",2005,AUTHORITY["EPSG","1122"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","6639"]]');