EPSG:3857 — WGS 84 / Pseudo-Mercator

Projected · World - 85°S to 85°N

Export Formats

OGC WKT

PROJCS[
    "WGS 84 / Pseudo-Mercator",
    GEOGCS[
        "WGS 84",
        DATUM[
            "WGS_1984",
            SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],
            AUTHORITY["EPSG","6326"]
        ],
        PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],
        UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],
        AUTHORITY["EPSG","4326"]
    ],
    PROJECTION["Mercator_1SP"],
    PARAMETER["central_meridian",0],
    PARAMETER["scale_factor",1],
    PARAMETER["false_easting",0],
    PARAMETER["false_northing",0],
    UNIT["metre",1,AUTHORITY["EPSG","9001"]],
    AXIS["Easting",EAST],
    AXIS["Northing",NORTH],
    EXTENSION[
        "PROJ4",
        "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"
    ],
    AUTHORITY["EPSG","3857"]
]

WKT2

PROJCRS[
    "WGS 84 / Pseudo-Mercator",
    BASEGEOGCRS[
        "WGS 84",
        ENSEMBLE[
            "World Geodetic System 1984 ensemble",
            MEMBER["World Geodetic System 1984 (Transit)",ID["EPSG",1166]],
            MEMBER["World Geodetic System 1984 (G730)",ID["EPSG",1152]],
            MEMBER["World Geodetic System 1984 (G873)",ID["EPSG",1153]],
            MEMBER["World Geodetic System 1984 (G1150)",ID["EPSG",1154]],
            MEMBER["World Geodetic System 1984 (G1674)",ID["EPSG",1155]],
            MEMBER["World Geodetic System 1984 (G1762)",ID["EPSG",1156]],
            MEMBER["World Geodetic System 1984 (G2139)",ID["EPSG",1309]],
            MEMBER["World Geodetic System 1984 (G2296)",ID["EPSG",1383]],
            ELLIPSOID[
                "WGS 84",
                6378137,
                298.257223563,
                LENGTHUNIT["metre",1,ID["EPSG",9001]],
                ID["EPSG",7030]
            ],
            ENSEMBLEACCURACY[2],
            ID["EPSG",6326]
        ],
        ID["EPSG",4326]
    ],
    CONVERSION[
        "Popular Visualisation Pseudo-Mercator",
        METHOD["Popular Visualisation Pseudo Mercator",ID["EPSG",1024]],
        PARAMETER[
            "Latitude of natural origin",
            0,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8801]
        ],
        PARAMETER[
            "Longitude of natural origin",
            0,
            ANGLEUNIT["degree",0.0174532925199433,ID["EPSG",9102]],
            ID["EPSG",8802]
        ],
        PARAMETER[
            "False easting",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8806]
        ],
        PARAMETER[
            "False northing",
            0,
            LENGTHUNIT["metre",1,ID["EPSG",9001]],
            ID["EPSG",8807]
        ],
        ID["EPSG",3856]
    ],
    CS[Cartesian,2,ID["EPSG",4499]],
    AXIS["Easting (X)",east],
    AXIS["Northing (Y)",north],
    LENGTHUNIT["metre",1,ID["EPSG",9001]],
    ID["EPSG",3857]
]

PROJ.4

+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs

Proj4js

How to add a projection to Proj4js? →

proj4.defs("EPSG:3857", "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs");

JSON

{
  "type": "CoordinateReferenceSystem",
  "code": 3857,
  "name": "WGS 84 / Pseudo-Mercator",
  "kind": "projected",
  "area": "World - 85°S to 85°N",
  "unit": "metre",
  "bbox": [
    -85.06,
    -180,
    85.06,
    180
  ],
  "proj4": "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +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 (3857, 'EPSG', 3857, '+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs', 'PROJCS["WGS 84 / Pseudo-Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"],AUTHORITY["EPSG","3857"]]');

MapServer

How to add a projection to MapServer? →

PROJECTION
  "+proj=merc"
  "+a=6378137"
  "+b=6378137"
  "+lat_ts=0"
  "+lon_0=0"
  "+x_0=0"
  "+y_0=0"
  "+k=1"
  "+units=m"
  "+nadgrids=@null"
  "+wktext"
  "+no_defs"
  "+type=crs"
END

GeoServer

How to add a projection to GeoServer? →

3857=PROJCS["WGS 84 / Pseudo-Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"],AUTHORITY["EPSG","3857"]]

Related Coordinate Systems (428)

Available Transformations (1293)

Transformations inherited from base CRS: EPSG:4326 (WGS 84)

Transformation	Source → Target	Accuracy (m)
JAD2001 to WGS 84 (1)	4758 → 4326	0
QND95 to WGS 84 (1)	4614 → 4326	0
PRS92 to WGS 84 (1)	4683 → 4326	0.05
Guadeloupe 1948 to WGS 84 (2)	4622 → 4326	0.1
LGD2006 to WGS 84 (1)	4754 → 4326	0.1
Martinique 1938 to WGS 84 (2)	4625 → 4326	0.1
WGS 84 to IG05/12 Intermediate CRS	4326 → 6990	0.1
Nahrwan 1967 to WGS 84 (12)	4270 → 4326	0.15
Pointe Noire to WGS 84 (3)	4282 → 4326	0.15
Bogota 1975 to WGS 84 (2)	4218 → 4326	0.2

Other CRS using World Geodetic System 1984 ensemble (366)

Frequently Asked Questions

How do I add EPSG:3857 to GeoServer?

Add the following definition to your GeoServer configuration:

3857=PROJCS["WGS 84 / Pseudo-Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"],AUTHORITY["EPSG","3857"]]

Read the full GeoServer guide →

How do I add EPSG:3857 to PostGIS?

Add the following definition to your PostGIS configuration:

INSERT INTO spatial_ref_sys (srid, auth_name, auth_srid, proj4text, srtext)
VALUES (3857, 'EPSG', 3857, '+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs', 'PROJCS["WGS 84 / Pseudo-Mercator",GEOGCS["WGS 84",DATUM["WGS_1984",SPHEROID["WGS 84",6378137,298.257223563,AUTHORITY["EPSG","7030"]],AUTHORITY["EPSG","6326"]],PRIMEM["Greenwich",0,AUTHORITY["EPSG","8901"]],UNIT["degree",0.0174532925199433,AUTHORITY["EPSG","9122"]],AUTHORITY["EPSG","4326"]],PROJECTION["Mercator_1SP"],PARAMETER["central_meridian",0],PARAMETER["scale_factor",1],PARAMETER["false_easting",0],PARAMETER["false_northing",0],UNIT["metre",1,AUTHORITY["EPSG","9001"]],AXIS["Easting",EAST],AXIS["Northing",NORTH],EXTENSION["PROJ4","+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs"],AUTHORITY["EPSG","3857"]]');

Read the full PostGIS guide →

How do I add EPSG:3857 to MapServer?

Add the following definition to your MapServer configuration:

PROJECTION
  "+proj=merc"
  "+a=6378137"
  "+b=6378137"
  "+lat_ts=0"
  "+lon_0=0"
  "+x_0=0"
  "+y_0=0"
  "+k=1"
  "+units=m"
  "+nadgrids=@null"
  "+wktext"
  "+no_defs"
  "+type=crs"
END

Read the full MapServer guide →

How do I use EPSG:3857 with Proj4js?

Add the following definition to your Proj4js configuration:

proj4.defs("EPSG:3857", "+proj=merc +a=6378137 +b=6378137 +lat_ts=0 +lon_0=0 +x_0=0 +y_0=0 +k=1 +units=m +nadgrids=@null +wktext +no_defs +type=crs");

Read the full Proj4js guide →

Type

Projected

Unit

metre

Geodetic CRS

WGS 84

Datum

World Geodetic System 1984 ensemble

Area of Use

World - 85°S to 85°N

World between 85.06°S and 85.06°N.

Coordinate System

Cartesian 2D CS. Axes: easting, northing (X,Y). Orientations: east, north. UoM: m.

Center Coordinates

0.00 -0.00

Projected Bounds

20048966.10 -20037508.3420037508.34 -20048966.10

WGS84 Bounds

85.06 -180.00180.00 -85.06

Data Source

EPSG

Information Source

Microsoft.

Revision Date

2020-03-14

Scope

Web mapping and visualisation.

Remarks

Not a recognised geodetic system. Uses spherical development of ellipsoidal coordinates. Relative to WGS 84 / World Mercator (CRS code 3395) gives errors of 0.7 percent in scale and differences in northing of up to 43km in the map (21km on the ground).

EPSG

3857

ESRI Equivalent

ESRI:102100