EPSG Geodetic Parameter Dataset
Version: 8.3.4

EPSG:3857

EPSG Geodetic Parameter Registry
Version: 8.3.4


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Name  WGS 84 / PseudoMercator  VALID  
Identifier 
urn:ogc:def:crs:EPSG::3857
EPSG::3857


Aliases  Alias  Naming System  Remarks  

WGS 84 / Popular Visualisation PseudoMercator  EPSG alias 


Scope  Certain Web mapping and visualisation applications.  
Remarks  Uses spherical development of ellipsoidal coordinates. Relative to an ellipsoidal development errors of up to 800 metres in position and 0.7 percent in scale may arise. It is not a recognised geodetic system: see WGS 84 / World Mercator (CRS code 3395).  
Domain of Validity  World between 85.06°S and 85.06°N.  
Derived From  Base CRS name  WGS 84  

Base CRS type  geographic 2D  

Geodetic Datum  World Geodetic System 1984 *** Alias(es): [WGS 84] ***  


Prime Meridian  Greenwich 

degree  


Ellipsoid  WGS 84 *** Alias(es): [WGS84] ***  



Remarks  Inverse flattening derived from four defining parameters (semimajor axis; C20 = 484.16685*10e6; earth's angular velocity w = 7292115e11 rad/sec; gravitational constant GM = 3986005e8 m*m*m/s/s).  



Shape  Ellipsoid  



Semi major axis (a)  6378137  metre  



Inverse flattening  298.257223563  unity  
Map Projection  Name  Popular Visualisation PseudoMercator *** Alias(es): [PseudoMercator] ***  

Operation Method  Popular Visualisation Pseudo Mercator  


Is the operation reversible?  Yes  

Conversion Parameters  Parameter Name  Parameter Value or Parameter File  Unit of Measure  


Latitude of natural origin 

degree  


Longitude of natural origin 

degree  


False easting  0  metre  


False northing  0  metre  
Coordinate Axes  Order  Name  Abbrev  Unit of Measure  Orientation  

1  Easting  X  metre  east  

2  Northing  Y  metre  north 