EPSG:21818 — Bogota 1975 / UTM zone 18N

Projected · Colombia - offshore Caribbean west of 72°W

Export Formats

OGC WKT

PROJCS[
    "Bogota 1975 / UTM zone 18N",
    GEOGCS[
        "Bogota 1975",
        DATUM[
            "Bogota_1975",
            SPHEROID["International 1924",6378388,297],
            TOWGS84[307,304,-318,0,0,0,0]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4218"]
    ],
    PROJECTION["Transverse_Mercator"],
    PARAMETER["latitude_of_origin",0],
    PARAMETER["central_meridian",-75],
    PARAMETER["scale_factor",0.9996],
    PARAMETER["false_easting",500000],
    PARAMETER["false_northing",0],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    AUTHORITY["EPSG","21818"]
]

WKT2

PROJCRS[
    "Bogota 1975 / UTM zone 18N",
    BASEGEOGCRS[
        "Bogota 1975",
        DATUM[
            "Bogota 1975",
            ELLIPSOID[
                "International 1924",
                6378388,
                297,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7022]
            ],
            ID["EPSG",6218]
        ],
        ID["EPSG",4218]
    ],
    CONVERSION[
        "UTM zone 18N",
        METHOD["Transverse Mercator",ID["EPSG",9807]],
        PARAMETER[
            "Latitude of natural origin",
            0,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8801]
        ],
        PARAMETER[
            "Longitude of natural origin",
            -75,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "Scale factor at natural origin",
            0.9996,
            SCALEUNIT["unity",1,ID["EPSG",9201]],
            ID["EPSG",8805]
        ],
        PARAMETER[
            "False easting",
            500000,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",16018]
    ],
    CS[Cartesian,2,ID["EPSG",4400]],
    AXIS["Easting (E)",east],
    AXIS["Northing (N)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",21818]
]

PROJ.4

+proj=utm +zone=18 +ellps=intl +towgs84=307,304,-318,0,0,0,0 +units=m +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:21818", "+proj=utm +zone=18 +ellps=intl +towgs84=307,304,-318,0,0,0,0 +units=m +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 21818,
  "name": "Bogota 1975 / UTM zone 18N",
  "kind": "projected",
  "area": "Colombia - offshore Caribbean west of 72°W",
  "unit": "metre",
  "bbox": [
    7.9,
    -77.37,
    13.68,
    -72
  ],
  "proj4": "+proj=utm +zone=18 +ellps=intl +towgs84=307,304,-318,0,0,0,0 +units=m +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 (21818, 'EPSG', 21818, '+proj=utm +zone=18 +ellps=intl +towgs84=307,304,-318,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["Bogota 1975 / UTM zone 18N",GEOGCS["Bogota 1975",DATUM["Bogota_1975",SPHEROID["International 1924",6378388,297],TOWGS84[307,304,-318,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4218"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-75],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","21818"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=utm"
  "+zone=18"
  "+ellps=intl"
  "+towgs84=307,304,-318,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

21818=PROJCS["Bogota 1975 / UTM zone 18N",GEOGCS["Bogota 1975",DATUM["Bogota_1975",SPHEROID["International 1924",6378388,297],TOWGS84[307,304,-318,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4218"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-75],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","21818"]]

Related Coordinate Systems

Available Transformations (28)

Transformations inherited from base CRS: EPSG:4218 (Bogota 1975)

Transformation	Source → Target	Accuracy (m)
Bogota 1975 (Bogota) to Bogota 1975 (1)	4802 → 4218	0
Bogota 1975 to WGS 84 (2)	4218 → 4326	0.2
Bogota 1975 to MAGNA-SIRGAS (1)	4218 → 4686	1
Bogota 1975 to WGS 84 (3)	4218 → 4326	1
Bogota 1975 to MAGNA-SIRGAS (2)	4218 → 4686	1
Bogota 1975 to WGS 84 (4)	4218 → 4326	1
Bogota 1975 to MAGNA-SIRGAS (3)	4218 → 4686	1
Bogota 1975 to WGS 84 (5)	4218 → 4326	1
Bogota 1975 to MAGNA-SIRGAS (4)	4218 → 4686	1
Bogota 1975 to WGS 84 (6)	4218 → 4326	1

Other CRS using Bogota 1975

Frequently Asked Questions

How do I add EPSG:21818 to GeoServer?

Add the following definition to your GeoServer configuration:

21818=PROJCS["Bogota 1975 / UTM zone 18N",GEOGCS["Bogota 1975",DATUM["Bogota_1975",SPHEROID["International 1924",6378388,297],TOWGS84[307,304,-318,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4218"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-75],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","21818"]]

Read the full GeoServer guide →

How do I add EPSG:21818 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (21818, 'EPSG', 21818, '+proj=utm +zone=18 +ellps=intl +towgs84=307,304,-318,0,0,0,0 +units=m +no_defs +type=crs', 'PROJCS["Bogota 1975 / UTM zone 18N",GEOGCS["Bogota 1975",DATUM["Bogota_1975",SPHEROID["International 1924",6378388,297],TOWGS84[307,304,-318,0,0,0,0]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4218"]],PROJECTION["Transverse_Mercator"],PARAMETER["latitude_of_origin",0],PARAMETER["central_meridian",-75],PARAMETER["scale_factor",0.9996],PARAMETER["false_easting",500000],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],AUTHORITY["EPSG","21818"]]');

Read the full PostGIS guide →

How do I add EPSG:21818 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=utm"
  "+zone=18"
  "+ellps=intl"
  "+towgs84=307,304,-318,0,0,0,0"
  "+units=m"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:21818 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:21818", "+proj=utm +zone=18 +ellps=intl +towgs84=307,304,-318,0,0,0,0 +units=m +no_defs +type=crs");

Read the full Proj4js guide →