Unit: degree (supplier to define representation)

Geodetic CRS: POSGAR 98

Datum: Posiciones Geodesicas Argentinas 1998

Ellipsoid: GRS 1980

Prime meridian: Greenwich

Data source: EPSG

Information source: Instituto Geográfico Militar de la República Argentina, http://www.igm.gov.ar

Revision date: 2011-03-28

Scope: Geodesy.

Remarks: Densification in Argentina of SIRGAS 1995. Until May 2009 replaced POSGAR 94 for many practical purposes (but not as the legal system). POSGAR 94 was officially replaced by POSGAR 2007 in May 2009.

Area of use: Argentina - onshore and offshore.

Coordinate system: Ellipsoidal 3D CS. Axes: latitude, longitude, ellipsoidal height. Orientations: north, east, up. UoM: degree, degree, metre.

Center coordinates
-63.11 -40.09

Projected bounds:
-73.59 -58.41
-52.63 -21.78

WGS84 bounds:
-73.59 -58.41
-52.63 -21.78

Argentina - onshore and offshore.
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Definition: ESRI WKT


Definition: PROJ.4

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

Definition: JavaScript (Proj4js)

proj4.defs("EPSG:4961","+proj=longlat +ellps=GRS80 +no_defs +type=crs");

Definition: JSON

    "$schema": "https://proj.org/schemas/v0.4/projjson.schema.json",
    "type": "GeographicCRS",
    "name": "POSGAR 98",
    "datum": {
        "type": "GeodeticReferenceFrame",
        "name": "Posiciones Geodesicas Argentinas 1998",
        "ellipsoid": {
            "name": "GRS 1980",
            "semi_major_axis": 6378137,
            "inverse_flattening": 298.257222101
    "coordinate_system": {
        "subtype": "ellipsoidal",
        "axis": [
                "name": "Geodetic latitude",
                "abbreviation": "Lat",
                "direction": "north",
                "unit": "degree"
                "name": "Geodetic longitude",
                "abbreviation": "Lon",
                "direction": "east",
                "unit": "degree"
                "name": "Ellipsoidal height",
                "abbreviation": "h",
                "direction": "up",
                "unit": "metre"
    "scope": "Geodesy.",
    "area": "Argentina - onshore and offshore.",
    "bbox": {
        "south_latitude": -58.41,
        "west_longitude": -73.59,
        "north_latitude": -21.78,
        "east_longitude": -52.63
    "id": {
        "authority": "EPSG",
        "code": 4961

Definition: MapServer - MAPfile


Definition: Mapnik

<?xml version="1.0" encoding="utf-8"?>
<Map srs="+proj=longlat +ellps=GRS80 +no_defs +type=crs">
	<Layer srs="+proj=longlat +ellps=GRS80 +no_defs +type=crs">

Definition: SQL (PostGIS)

INSERT into spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext) values ( 4961, 'EPSG', 4961, '+proj=longlat +ellps=GRS80 +no_defs +type=crs', 'None');

Definition: OGC WKT 2 (2019)

GEOGCRS["POSGAR 98",DATUM["Posiciones Geodesicas Argentinas 1998",ELLIPSOID["GRS 1980",6378137,298.257222101,LENGTHUNIT["metre",1]]],PRIMEM["Greenwich",0,ANGLEUNIT["degree",0.0174532925199433]],CS[ellipsoidal,3],AXIS["geodetic latitude (Lat)",north,ORDER[1],ANGLEUNIT["degree",0.0174532925199433]],AXIS["geodetic longitude (Lon)",east,ORDER[2],ANGLEUNIT["degree",0.0174532925199433]],AXIS["ellipsoidal height (h)",up,ORDER[3],LENGTHUNIT["metre",1]],USAGE[SCOPE["Geodesy."],AREA["Argentina - onshore and offshore."],BBOX[-58.41,-73.59,-21.78,-52.63]],ID["EPSG",4961]]