EPSG:4909 — GR96

Geographic 3D · Greenland

Export Formats

WKT2

GEOGCRS[
    "GR96",
    ENSEMBLE[
        "Greenland Reference 1996 ensemble",
        MEMBER["Greenland Reference 1996 (1996)",ID["EPSG",1420]],
        MEMBER["Greenland Reference 1996 (2021)",ID["EPSG",1419]],
        ELLIPSOID[
            "GRS 1980",
            6378137,
            298.257222101,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",7019]
        ],
        ENSEMBLEACCURACY[0.25],
        ID["EPSG",1421]
    ],
    CS[ellipsoidal,3,ID["EPSG",6423]],
    AXIS[
        "Geodetic latitude (Lat)",
        north,
        ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]]
    ],
    AXIS[
        "Geodetic longitude (Lon)",
        east,
        ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]]
    ],
    AXIS["Ellipsoidal height (h)",up,LENGTHUNIT["metre",1,ID["EPSG",9001]]],
    ID["EPSG",4909]
]

PROJ.4

+proj=longlat +ellps=GRS80 +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:4909", "+proj=longlat +ellps=GRS80 +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 4909,
  "name": "GR96",
  "kind": "geographic 3D",
  "area": "Greenland",
  "unit": "degree (supplier to define representation)",
  "bbox": [
    56.38,
    -75,
    87.03,
    7.99
  ],
  "proj4": "+proj=longlat +ellps=GRS80 +no_defs +type=crs"
}

PostGIS

How to add a projection to PostGIS? →

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (4909, 'EPSG', 4909, '+proj=longlat +ellps=GRS80 +no_defs +type=crs', '');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=longlat"
  "+ellps=GRS80"
  "+no_defs"
  "+type=crs"
END

Related Coordinate Systems

Available Transformations (8)

Transformation	Source → Target	Accuracy (m)
GR96 to GLMSL(2023) depth (1)	4909 → 10649	0.05
GR96 to GR96 + GLMSL(2023) depth (1)	4909 → 10651	0.05
GR96 to GVR2000 height (1)	4909 → 8266	0.1
GR96 to GVR2016 height (1)	4909 → 8267	0.1
GR96 to GR96 + GVR2000 height (1)	4909 → 8349	0.1
GR96 to GR96 + GVR2016 height (1)	4909 → 8350	0.1
GR96 to GLLAT(2023) depth (1)	4909 → 10650	0.1
GR96 to GR96 + GLLAT(2023) depth (1)	4909 → 10652	0.1

Other CRS for GL

Other CRS using Greenland Reference 1996 ensemble (33)

Frequently Asked Questions

How do I add EPSG:4909 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (4909, 'EPSG', 4909, '+proj=longlat +ellps=GRS80 +no_defs +type=crs', '');

Read the full PostGIS guide →

How do I add EPSG:4909 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=longlat"
  "+ellps=GRS80"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:4909 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:4909", "+proj=longlat +ellps=GRS80 +no_defs +type=crs");

Read the full Proj4js guide →