EPSG:4676

Vientiane 1982

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Available transformations
to EPSG:4326
EPSG:4326 - WGS 84

  • Laos. , accuracy 6.0 m, code 8651 (default)

Selected transformation

Name: Vientiane 1982 to WGS 84 (1)

Remarks: Can be implemented as a geocentric translation tfm with param. values dX = 42.358m, dY = -124.688m, dZ= -37.366m.

Information source: OGP

Revision date: 2020-03-14

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: Vientiane 1982

Datum: Vientiane 1982

Ellipsoid: Krassowsky 1940

Prime meridian: Greenwich

Data source: EPSG

Information source: National Geographic Department

Revision date: 2004-04-27

Scope: Topographic mapping (medium and small scale).

Remarks: Replaced by Lao 1993 and then by Lao 1997. Vientiane 1982 coordinate values are within 3m of Lao 1997 values.

Area of use: Laos.

Coordinate system: Ellipsoidal 2D CS. Axes: latitude, longitude. Orientations: north, east. UoM: degree

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Center coordinates
103.87 18.21

WGS84 bounds:
100.09 13.92
107.64 22.5

Laos.
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Definition: OGC Well Known Text 2 (2019)

BOUNDCRS[
    SOURCECRS[
        GEOGCRS["Vientiane 1982",
            DATUM["Vientiane 1982",
                ELLIPSOID["Krassowsky 1940",6378245,298.3,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            ID["EPSG",4676],
            REMARK["Replaced by Lao 1993 and then by Lao 1997. Vientiane 1982 coordinate values are within 3m of Lao 1997 values."]]],
    TARGETCRS[
        GEOGCRS["Lao 1997",
            DATUM["Lao National Datum 1997",
                ELLIPSOID["Krassowsky 1940",6378245,298.3,
                    LENGTHUNIT["metre",1]]],
            PRIMEM["Greenwich",0,
                ANGLEUNIT["degree",0.0174532925199433]],
            CS[ellipsoidal,2],
                AXIS["geodetic latitude (Lat)",north,
                    ORDER[1],
                    ANGLEUNIT["degree",0.0174532925199433]],
                AXIS["geodetic longitude (Lon)",east,
                    ORDER[2],
                    ANGLEUNIT["degree",0.0174532925199433]],
            ID["EPSG",4678],
            REMARK["Replaces Lao 1993 which in turn replaced Vientiane 1982. Lao 1993 coordinate values are within 1m of Lao 1997 values. Vientiane 1982 coordinate values are within 3m of Lao 1997 values."]]],
    ABRIDGEDTRANSFORMATION["Vientiane 1982 to Lao 1997 (1)",
        METHOD["Geocentric translations (geog2D domain)",
            ID["EPSG",9603]],
        PARAMETER["X-axis translation",-2.227,
            ID["EPSG",8605]],
        PARAMETER["Y-axis translation",6.524,
            ID["EPSG",8606]],
        PARAMETER["Z-axis translation",2.178,
            ID["EPSG",8607]],
        ID["EPSG",1063]]]

Definition: PROJ.4

+proj=longlat +ellps=krass +towgs84=44.585,-131.212,-39.544,0,0,0,0 +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4676","+proj=longlat +ellps=krass +towgs84=44.585,-131.212,-39.544,0,0,0,0 +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "type": "BoundCRS",
    "source_crs": {
        "type": "GeographicCRS",
        "name": "Vientiane 1982",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Vientiane 1982",
            "ellipsoid": {
                "name": "Krassowsky 1940",
                "semi_major_axis": 6378245,
                "inverse_flattening": 298.3
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": "degree"
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Lon",
                    "direction": "east",
                    "unit": "degree"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4676
        },
        "remarks": "Replaced by Lao 1993 and then by Lao 1997. Vientiane 1982 coordinate values are within 3m of Lao 1997 values."
    },
    "target_crs": {
        "type": "GeographicCRS",
        "name": "Lao 1997",
        "datum": {
            "type": "GeodeticReferenceFrame",
            "name": "Lao National Datum 1997",
            "ellipsoid": {
                "name": "Krassowsky 1940",
                "semi_major_axis": 6378245,
                "inverse_flattening": 298.3
            }
        },
        "coordinate_system": {
            "subtype": "ellipsoidal",
            "axis": [
                {
                    "name": "Geodetic latitude",
                    "abbreviation": "Lat",
                    "direction": "north",
                    "unit": "degree"
                },
                {
                    "name": "Geodetic longitude",
                    "abbreviation": "Lon",
                    "direction": "east",
                    "unit": "degree"
                }
            ]
        },
        "id": {
            "authority": "EPSG",
            "code": 4678
        },
        "remarks": "Replaces Lao 1993 which in turn replaced Vientiane 1982. Lao 1993 coordinate values are within 1m of Lao 1997 values. Vientiane 1982 coordinate values are within 3m of Lao 1997 values."
    },
    "transformation": {
        "name": "Vientiane 1982 to Lao 1997 (1)",
        "method": {
            "name": "Geocentric translations (geog2D domain)",
            "id": {
                "authority": "EPSG",
                "code": 9603
            }
        },
        "parameters": [
            {
                "name": "X-axis translation",
                "value": -2.227,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8605
                }
            },
            {
                "name": "Y-axis translation",
                "value": 6.524,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8606
                }
            },
            {
                "name": "Z-axis translation",
                "value": 2.178,
                "unit": "metre",
                "id": {
                    "authority": "EPSG",
                    "code": 8607
                }
            }
        ],
        "id": {
            "authority": "EPSG",
            "code": 1063
        }
    }
}

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=krass"
	"towgs84=44.585,-131.212,-39.544,0,0,0,0"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=krass +towgs84=44.585,-131.212,-39.544,0,0,0,0 +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=krass +towgs84=44.585,-131.212,-39.544,0,0,0,0 +no_defs +type=crs">
	</Layer>
</Map>