EPSG:4678

Lao 1997

Attributes

Unit: degree (supplier to define representation)

Geodetic CRS: Lao 1997

Datum: Lao National Datum 1997

Ellipsoid: Krassowsky 1940

Prime meridian: Greenwich

Data source: EPSG

Information source: EPSG. See 3D CRS for original information source.

Revision date: 2007-08-27

Scope: Horizontal component of 3D system.

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.

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

GEOGCS["Lao 1997",
    DATUM["Lao_National_Datum_1997",
        SPHEROID["Krassowsky 1940",6378245,298.3,
            AUTHORITY["EPSG","7024"]],
        AUTHORITY["EPSG","6678"]],
    PRIMEM["Greenwich",0,
        AUTHORITY["EPSG","8901"]],
    UNIT["degree",0.0174532925199433,
        AUTHORITY["EPSG","9122"]],
    AUTHORITY["EPSG","4678"]]

Definition: OGC Well Known Text 2 (2019)

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]],
    USAGE[
        SCOPE["Horizontal component of 3D system."],
        AREA["Laos."],
        BBOX[13.92,100.09,22.5,107.64]],
    ID["EPSG",4678]]

Definition: ESRI Well Known Text

GEOGCS["GCS_Lao_1997",
    DATUM["D_Lao_National_Datum_1997",
        SPHEROID["Krasovsky_1940",6378245.0,298.3]],
    PRIMEM["Greenwich",0.0],
    UNIT["Degree",0.0174532925199433]]

Definition: PROJ.4

+proj=longlat +ellps=krass +no_defs +type=crs

Definition: JavaScript (Proj4js) 

proj4.defs("EPSG:4678","+proj=longlat +ellps=krass +no_defs +type=crs");

Definition: JSON

{
    "$schema": "https://proj.org/schemas/v0.7/projjson.schema.json",
    "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"
            }
        ]
    },
    "scope": "Horizontal component of 3D system.",
    "area": "Laos.",
    "bbox": {
        "south_latitude": 13.92,
        "west_longitude": 100.09,
        "north_latitude": 22.5,
        "east_longitude": 107.64
    },
    "id": {
        "authority": "EPSG",
        "code": 4678
    }
}

Definition: GeoServer

4678=GEOGCS["Lao 1997",DATUM["Lao_National_Datum_1997",SPHEROID["Krassowsky 1940",6378245,298.3,AUTHORITY["EPSG","7024"]],AUTHORITY["EPSG","6678"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4678"]]

Definition: MapServer - MAPfile

PROJECTION
	"proj=longlat"
	"ellps=krass"
	"no_defs"
	"type=crs"
END

Definition: Mapnik

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

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4678, 'EPSG', 4678, '+proj=longlat +ellps=krass +no_defs +type=crs', 'GEOGCS["Lao 1997",DATUM["Lao_National_Datum_1997",SPHEROID["Krassowsky 1940",6378245,298.3,AUTHORITY["EPSG","7024"]],AUTHORITY["EPSG","6678"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4678"]]');