EPSG Geodetic Parameter Dataset
Version: 8.5.1
EPSG:3857
EPSG Geodetic Parameter Registry
Version: 8.5.1
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Detail:
short
Style:
OGP Default With Code
Projected CRS
Name WGS 84 / Pseudo-Mercator VALID
Identifier
urn:ogc:def:crs:EPSG::3857
EPSG::3857
Aliases Alias Naming System Remarks
WGS 84 / Popular Visualisation Pseudo-Mercator EPSG alias
Scope Certain Web mapping and visualisation applications. It is not a recognised geodetic system: for that see ellipsoidal Mercator CRS code 3395 (WGS 84 / World Mercator).
Remarks Uses spherical development of ellipsoidal coordinates. Relative to full ellipsoidal development in WGS 84 / World Mercator (CRS code 3395) differences of 0.7 percent in scale, up to 43km in northing and up to 21km in relative position of may arise.
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 (semi-major axis; C20 = -484.16685*10e-6; 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 Pseudo-Mercator *** Alias(es): [Pseudo-Mercator] ***
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