Source: EPSG:8775 — NAD83 / Rhode Island (ftUS) + NAVD88 height (ftUS)
compound horizontal + vertical reference system · Area of use: USA - Rhode Island
+proj=tmerc +lat_0=41.0833333333333 +lon_0=-71.5 +k=0.99999375 +x_0=99999.99998984 +y_0=0 +ellps=GRS80 +towgs84=0,0,0,0,0,0,0 +units=us-ft +vunits=us-ft +no_defs +type=crsMore about EPSG:8775 →