Ellipsoid: Krassowsky 1940
Prime meridian: Greenwich
Data source: EPSG
Information source: National Geographic Department
Revision date: 2008-06-24
Scope: Cadastre, engineering survey, topographic mapping.
Remarks: Replaces Lao 1993.
Area of use: Laos.
Definition: OGC Well Known Text
DATUM["Lao_National_Datum_1997", SPHEROID["Krassowsky 1940",6378245,298.3, AUTHORITY["EPSG","7024"]], AUTHORITY["EPSG","6678"]]
Definition: OGC Well Known Text 2 (2019)
DATUM["Lao National Datum 1997", ELLIPSOID["Krassowsky 1940",6378245,298.3, LENGTHUNIT["metre",1]], ID["EPSG",6678]]
Definition: ESRI Well Known Text
DATUM["D_Lao_National_Datum_1997", SPHEROID["Krasovsky_1940",6378245.0,298.3]]
Definition: JSON
{ "$schema": "https://proj.org/schemas/v0.5/projjson.schema.json", "type": "GeodeticReferenceFrame", "name": "Lao National Datum 1997", "ellipsoid": { "name": "Krassowsky 1940", "semi_major_axis": 6378245, "inverse_flattening": 298.3 }, "scope": "Cadastre, engineering survey, topographic mapping.", "area": "Laos.", "bbox": { "south_latitude": 13.92, "west_longitude": 100.09, "north_latitude": 22.5, "east_longitude": 107.64 }, "id": { "authority": "EPSG", "code": 6678 } }