I note from wiki that there are other CRS under WGS84 apart from EPSG:4326 but I am only interested in EPSG:4326.

I have also visited https://epsg.io/ page regarding EPSG:4326; however, I can’t find the keywords to solve my question. Can someone shed some lights on my problem?

  • 2
    geocentricity has to do with astronomical considerations, but by no means with geodesy. Jun 5, 2022 at 15:06
  • Definitive registry for EPSG is epsg.org, not epsg.io
    – nmtoken
    Jun 9, 2022 at 8:39

1 Answer 1


Latitude and longitude are by definition geodetic. Latitude and longitude in WGS84 refer to the ellipsoid compatible with ITRS. This ellipsoid is earth-centered base on the mass center of the Earth.

  • So Latitude and longitude in WGS84 are geodetic? I always thought they were measured from the centre. I remember from my middle school textbook that they were measured from the centre.
    – Ken T
    Jun 7, 2022 at 6:07
  • 1
    @user2720402 middle school textbook tend to simplify thing, I wouldn't use them as reference on technical matter...
    – J.R
    Jun 7, 2022 at 14:33

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