EPSG:CODE

EPSG:4990 — Lao 1993

Geocentric · Laos

Export Formats

OGC WKT
GEOCCS[
    "Lao 1993",
    DATUM[
        "Lao_1993",
        SPHEROID["Krassowsky 1940",6378245,298.3,AUTHORITY["EPSG","7024"]],
        AUTHORITY["EPSG","6677"]
    ],
    PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AXIS["Geocentric X",OTHER],
    AXIS["Geocentric Y",OTHER],
    AXIS["Geocentric Z",NORTH],
    AUTHORITY["EPSG","4990"]
]

Other CRS for LA

Other CRS using Lao 1993

Frequently Asked Questions

How do I add EPSG:4990 to GeoServer?

Add the following definition to your GeoServer configuration: 

4990=GEOCCS["Lao 1993",DATUM["Lao_1993",SPHEROID["Krassowsky 1940",6378245,298.3,AUTHORITY["EPSG","7024"]],AUTHORITY["EPSG","6677"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Geocentric X",OTHER],AXIS["Geocentric Y",OTHER],AXIS["Geocentric Z",NORTH],AUTHORITY["EPSG","4990"]]
Read the full GeoServer guide →

How do I add EPSG:4990 to PostGIS?

Add the following definition to your PostGIS configuration: 

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (4990, 'EPSG', 4990, '+proj=geocent +ellps=krass +units=m +no_defs +type=crs', 'GEOCCS["Lao 1993",DATUM["Lao_1993",SPHEROID["Krassowsky 1940",6378245,298.3,AUTHORITY["EPSG","7024"]],AUTHORITY["EPSG","6677"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Geocentric X",OTHER],AXIS["Geocentric Y",OTHER],AXIS["Geocentric Z",NORTH],AUTHORITY["EPSG","4990"]]');
Read the full PostGIS guide →

How do I add EPSG:4990 to MapServer?

Add the following definition to your MapServer configuration: 

PROJECTION
  "+proj=geocent"
  "+ellps=krass"
  "+units=m"
  "+no_defs"
  "+type=crs"
END
Read the full MapServer guide →

How do I use EPSG:4990 with Proj4js?

Add the following definition to your Proj4js configuration: 

proj4.defs("EPSG:4990", "+proj=geocent +ellps=krass +units=m +no_defs +type=crs");
Read the full Proj4js guide →