INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values (6917, 'EPSG', 6917, '+proj=longlat +ellps=WGS84 +vunits=m +no_defs +type=crs', 'COMPD_CS["SVY21 + SHD height",GEOGCS["SVY21",DATUM["SVY21",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6757"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4757"]],VERT_CS["SHD height",VERT_DATUM["Singapore Height Datum",2005,AUTHORITY["EPSG","1140"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Gravity-related height",UP],AUTHORITY["EPSG","6916"]],AUTHORITY["EPSG","6917"]]');