VERTCRS["St. Helena Tritan 2011 height",VDATUM["St. Helena Tritan Vertical Datum 2011"],CS[vertical,1],AXIS["gravity-related height (H)",up,LENGTHUNIT["metre",1]],USAGE[SCOPE["Engineering survey 2011 to 2015."],AREA["St Helena, Ascension and Tristan da Cunha - St Helena Island - onshore."],BBOX[-16.08,-5.85,-15.85,-5.59]],ID["EPSG",7889]]