EPSG:4676

Vientiane 1982

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

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

Selected transformation

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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SimpleMap

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]]],
    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]]],
    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
        }
    },
    "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
        }
    },
    "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>