Source: EPSG:9517 — SHGD2015 + SHVD2015 height
compound horizontal + vertical reference system · Area of use: St Helena - St Helena Island
+proj=longlat +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +geoidgrids=us_nga_egm08_25.tif +geoid_crs=WGS84 +vunits=m +no_defs +type=crsMore about EPSG:9517 →