compound not known https://www.opengis.net/def/crs-compound?1=http%3A%2F%2Fwww.opengis.net%2Fdef%2Fcrs%2FEPSG%2F0%2F4326%262=http%3A%2F%2Fwww.opengis.net%2Fdef%2Fcrs%2FEPSG%2F0%2F3855 WGS 84 / EGM2008 height