EPSG systems

EPSG:3409 NSIDC EASE-Grid South

Projected system (Lambert Azimuthal Equal Area (Spherical)) in use: World - south of 0°N. 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.

Convert coordinates Open in Carte Download the .prj
System record
CodeEPSG:3409
NameNSIDC EASE-Grid South
TypeProjected system — Lambert Azimuthal Equal Area (Spherical)
Area of use World - south of 0°N
Southern hemisphere.
Bounds W -180,00° · S -90,00° · E 180,00° · N 0,00°
Countries World
DatumNSIDC International 1924 Authalic Sphere
Ellipsoid International 1924 Authalic Sphere a = 6371228 m
Base geographic system EPSG:10346 — NSIDC Authalic Sphere
Unit metre (X north, Y north)
Transformation to WGS 84 No simple transformation published (ellipsoid alone)
ScopeEnvironmental science - used as basis for EASE grid.

Projection parameters

ParameterValueUnit
Latitude of natural origin-90degree
Longitude of natural origin0degree
False easting0metre
False northing0metre

proj4 definition

+proj=laea +lat_0=-90 +lon_0=0 +x_0=0 +y_0=0 +R=6371228 +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:3409.

WKT (ESRI format, the .prj content)

PROJCS["NSIDC_EASE_Grid_South",GEOGCS["NSIDC_Authalic_Sphere",DATUM["NSIDC_International_1924_Authalic_Sphere",SPHEROID["Sphere_International_1924_Authalic",6371228.0,0.0]],PRIMEM["Greenwich",0.0],UNIT["Degree",0.0174532925199433]],PROJECTION["Lambert_Azimuthal_Equal_Area"],PARAMETER["latitude_of_center",-90.0],PARAMETER["longitude_of_center",0.0],PARAMETER["false_easting",0.0],PARAMETER["false_northing",0.0],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.