EPSG:10346 NSIDC Authalic Sphere
Geographic system in latitude and longitude, in use: World. Datum, ellipsoid and transformation to WGS 84 below.
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.
| Code | EPSG:10346 |
|---|---|
| Name | NSIDC Authalic Sphere |
| Type | Geographic system |
| Area of use | World |
| Bounds | W -180,00° · S -90,00° · E 180,00° · N 90,00° |
| Countries | World |
| Datum | NSIDC International 1924 Authalic Sphere |
| Ellipsoid | International 1924 Authalic Sphere a = 6371228 m |
| Unit | degree (Lat north, Lon east) |
| Transformation to WGS 84 | No simple transformation published (ellipsoid alone) |
| Scope | Environmental science - used as basis for EASE grid. |
proj4 definition
+proj=longlat +R=6371228 +no_defsPaste it into QGIS, proj4js, PostGIS (spatial_ref_sys) or GDAL. +towgs84 carries the EPSG transformation to WGS 84; the official code stays EPSG:10346.
WKT (ESRI format, the .prj content)
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]]Other systems — World
- EPSG:9064ETRF94
- EPSG:9065ETRF96
- EPSG:9066ETRF97
- EPSG:9067ETRF2000
- EPSG:9068ETRF2005
- EPSG:9069ETRF2014
- EPSG:9354WGS 84 / IBCSO Polar Stereographic
- EPSG:9380IGb14
- EPSG:9474PZ-90.02
- EPSG:9475PZ-90.11
- EPSG:9755WGS 84 (G2139)
- EPSG:9990ITRF2020
- EPSG:10178IGS20
- EPSG:10345Hughes 1980
- EPSG:10571ETRF2020
- EPSG:10592WGS 84 / GLANCE Africa
- EPSG:10601WGS 84 / GLANCE Oceania
- EPSG:10606WGS 84 (G2296)
Source: EPSG registry v11.022 (IOGP), through the PROJ database. Always check a code on epsg.org before contractual work.