EPSG:CODE

EPSG:4912 — ITRF90

Geocentric · World

Export Formats

OGC WKT
GEOCCS[
    "ITRF90",
    DATUM[
        "International_Terrestrial_Reference_Frame_1990",
        SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],
        AUTHORITY["EPSG","6649"]
    ],
    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","4912"]
]

Related Coordinate Systems

Available Transformations (16)

Transformation Source → Target Accuracy (m)
ITRF90 to ETRF90 (1)
4912 → 7916 0
ITRF90 to ITRF91 (1)
4912 → 4913 0.007
ITRF90 to ITRF91 (2)
4912 → 4913 0.007
ITRF90 to ITRF2000 (1)
4912 → 4919 0.01
ITRF90 to ITRF2008 (1)
4912 → 5332 0.01
ITRF90 to ETRF2000 (1)
4912 → 7930 0.01
ITRF90 to ITRF2014 (1)
4912 → 7789 0.01
ITRF90 to ETRF2014 (1)
4912 → 8401 0.01
ITRF89 to ITRF90 (1)
4911 → 4912 0.01
ITRF90 to ITRF2020 (1)
4912 → 9988 0.01

Other CRS using International Terrestrial Reference Frame 1990

Frequently Asked Questions

How do I add EPSG:4912 to GeoServer?

Add the following definition to your GeoServer configuration: 

4912=GEOCCS["ITRF90",DATUM["International_Terrestrial_Reference_Frame_1990",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6649"]],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","4912"]]
Read the full GeoServer guide →

How do I add EPSG:4912 to PostGIS?

Add the following definition to your PostGIS configuration: 

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (4912, 'EPSG', 4912, '+proj=geocent +ellps=GRS80 +units=m +no_defs +type=crs', 'GEOCCS["ITRF90",DATUM["International_Terrestrial_Reference_Frame_1990",SPHEROID["GRS 1980",6378137,298.257222101,AUTHORITY["EPSG","7019"]],AUTHORITY["EPSG","6649"]],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","4912"]]');
Read the full PostGIS guide →

How do I add EPSG:4912 to MapServer?

Add the following definition to your MapServer configuration: 

PROJECTION
  "+proj=geocent"
  "+ellps=GRS80"
  "+units=m"
  "+no_defs"
  "+type=crs"
END
Read the full MapServer guide →

How do I use EPSG:4912 with Proj4js?

Add the following definition to your Proj4js configuration: 

proj4.defs("EPSG:4912", "+proj=geocent +ellps=GRS80 +units=m +no_defs +type=crs");
Read the full Proj4js guide →