Ellipsoid: Clarke 1880 (RGS)
Prime meridian: Greenwich
Data source: EPSG
Information source: Various industry sources.
Revision date: 2006-01-03
Scope: Coastal hydrography.
Remarks: A variation of this datum has been adopted by the oil industry but incorrectly using the International 1924 ellipsoid and not tied to the official Portuguese triangulation - see Mhast (onshore) and Mhast (offshore) (codes 6704 and 6705).
Area of use: Angola - Cabinda.
Definition: OGC Well Known Text
DATUM["Missao_Hidrografico_Angola_y_Sao_Tome_1951", SPHEROID["Clarke 1880 (RGS)",6378249.145,293.465, AUTHORITY["EPSG","7012"]], AUTHORITY["EPSG","6703"]]
Definition: OGC Well Known Text 2 (2019)
DATUM["Missao Hidrografico Angola y Sao Tome 1951", ELLIPSOID["Clarke 1880 (RGS)",6378249.145,293.465, LENGTHUNIT["metre",1]], ID["EPSG",6703]]
Definition: ESRI Well Known Text
DATUM["D_Mhast_1951", SPHEROID["Clarke_1880_RGS",6378249.145,293.465]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Missao Hidrografico Angola y Sao Tome 1951", "ellipsoid": { "name": "Clarke 1880 (RGS)", "semi_major_axis": 6378249.145, "inverse_flattening": 293.465 }, "scope": "Coastal hydrography.", "area": "Angola - Cabinda.", "bbox": { "south_latitude": -6.04, "west_longitude": 10.53, "north_latitude": -4.38, "east_longitude": 13.1 }, "id": { "authority": "EPSG", "code": 6703 } }