Editing Earth radius (section)

==Published values==
This table summarizes the accepted values of the Earth's radius.

{| class ="wikitable sortable"
! Agency
! Description
! Value (in meters)
! Ref
|-
| [[International Astronomical Union|IAU]]
| nominal "zero tide" equatorial
| {{val|6378100}}
| {{r|IAU XXIX}}
|-
| IAU
| nominal "zero tide" polar
| {{val|6356800}}
| {{r|IAU XXIX}}
|-
| [[International Union of Geodesy and Geophysics|IUGG]]
| equatorial radius
| {{val|6378137}}
| {{r|Moritz}}
|-
| IUGG
| semiminor axis (''b'')
| {{val|6356752.3141}}
| {{r|Moritz}}
|-
| IUGG
| polar radius of curvature (''c'')
| {{val|6399593.6259}}
| {{r|Moritz}}
|-
| IUGG
| mean radius (''R<sub>1</sub>'')
| {{val|6371008.7714}}
| {{r|Moritz}}
|-
| IUGG
| radius of sphere of same surface (''R<sub>2</sub>'')
| {{val|6371007.1810}}
| {{r|Moritz}}
|-
| IUGG
| radius of sphere of same volume (''R<sub>3</sub>'')
| {{val|6371000.7900}}
| {{r|Moritz}}
|-
| [[National Geospatial-Intelligence Agency|NGA]]
| [[WGS-84]] ellipsoid, semi-major axis (''a'')
| {{val|6378137.0}}
| {{r|tr8350_2}}
|-
| NGA
| WGS-84 ellipsoid, semi-minor axis (''b'')
| {{val|6356752.3142}}
| {{r|tr8350_2}} 
|-
| NGA
| WGS-84 ellipsoid, polar radius of curvature (''c'')
| {{val|6399593.6258}}
| {{r|tr8350_2}} 
|-
| NGA
| WGS-84 ellipsoid, Mean radius of semi-axes (''R<sub>1</sub>'')
| {{val|6371008.7714}}
| {{r|tr8350_2}} 
|-
| NGA
| WGS-84 ellipsoid, Radius of Sphere of Equal Area (''R<sub>2</sub>'')
| {{val|6371007.1809}}
| {{r|tr8350_2}} 
|-
| NGA
| WGS-84 ellipsoid, Radius of Sphere of Equal Volume (''R<sub>3</sub>'')
| {{val|6371000.7900}}
| {{r|tr8350_2}} 
|-
|
| [[GRS 80]] semi-major axis (''a'')
| {{val|6378137.0}}
|
|-
|
| [[GRS 80]] semi-minor axis (''b'')
| {{val|6356752.314140|p=≈}}
|
|-
|
| Spherical Earth Approx. of Radius (''R<sub>E</sub>'')
| {{val|6366707.0195}}
| <ref name="Phillips">{{cite book |last1=Phillips |first1=Warren |title=Mechanics of Flight |date=2004 |publisher=John Wiley & Sons, Inc. |isbn=0471334588 |page=923}}</ref>
|-
|
| meridional radius of curvature at the equator
| {{val|6335439}}
|
|-
| 
| Maximum (the summit of Chimborazo)
| {{val|6384400}}
| {{r|extrema}}
|-
| 
| Minimum (the floor of the Arctic Ocean)
| {{val|6352800}} 
| {{r|extrema}}
|-
| 
| Average distance from center to surface
| {{val|6371230|10}}
| {{r|chambat}}
|}