EPSG systems

EPSG:3412 NSIDC Sea Ice Polar Stereographic South

Projected system (Polar Stereographic (variant B)) in use: World - S hemisphere - south of 60°S. The full definition below, and conversion in one click.

EPSG publishes no simple transformation to WGS 84 for this datum: conversion works on the ellipsoid alone and can be off by tens of metres.

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System record
CodeEPSG:3412
NameNSIDC Sea Ice Polar Stereographic South
TypeProjected system — Polar Stereographic (variant B)
Area of use World - S hemisphere - south of 60°S
Southern hemisphere - south of 60°S onshore and offshore - Antarctica.
Bounds W -180,00° · S -90,00° · E 180,00° · N -60,00°
Countries World
DatumHughes 1980
Ellipsoid Hughes 1980 a = 6378273 m · 1/f = 298.279411123
Base geographic system EPSG:10345 — Hughes 1980
Unit metre (X north, Y north)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopePolar research.

Projection parameters

ParameterValueUnit
Latitude of standard parallel-70degree
Longitude of origin0degree
False easting0metre
False northing0metre

proj4 definition

+proj=stere +lat_0=-90 +lat_ts=-70 +lon_0=0 +x_0=0 +y_0=0 +a=6378273 +b=6356889.449 +units=m +no_defs

Paste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:3412.

WKT (ESRI format, the .prj content)

PROJCS["NSIDC_Sea_Ice_Polar_Stereographic_South",GEOGCS["GCS_Hughes_1980",DATUM["D_Hughes_1980",SPHEROID["Hughes_1980",6378273.0,298.279411123064]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Stereographic_South_Pole"],PARAMETER["False_Easting",0.0],PARAMETER["False_Northing",0.0],PARAMETER["Central_Meridian",0.0],PARAMETER["Standard_Parallel_1",-70.0],UNIT["Meter",1.0]]

All systems — World

Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.