I have read, several times, that the Great Pyramid is located at "the center of Earth's landmass".

How do we define "Earth's landmass"? And once defined, how do we find the center of it?


closed as off-topic by ACuriousMind, Qmechanic Mar 25 '15 at 17:56

  • This question does not appear to be about physics within the scope defined in the help center.
If this question can be reworded to fit the rules in the help center, please edit the question.

  • $\begingroup$ The wikipedia article provided by the accepted answer states: "it is the superficial barycenter of the mass distribution produced by treating each continent or island as a region of a thin shell of uniform density and approximating the geoid with a sphere." The first words in the barycenter article are "In physics". Also in the first mentioned article: "Andrew J. Woods, a physicist with Gulf Energy & Environmental Systems in San Diego, used a digital global map and calculated the coordinates". Perhaps someone could tell me what it is, rather than repeating "it is not about Physics". $\endgroup$ – Honest Abe Mar 26 '15 at 17:55
  • $\begingroup$ if that's meant to be an argument that the question is about physics, it's a remarkably weak one; in any case, this is probably a geology question. $\endgroup$ – David Z Mar 26 '15 at 18:58
  • $\begingroup$ @DavidZ From the beginning, I was not sure if this was an appropriate place to ask this question. I'm trying to come to a conclusion based on what has been given to me. However, continuing the stream of thought, it seems that if how we find the center of Earth's land mass is satellite dependent, then surely quite a bit of physics is involved. Launching the satellite and maintaining a proper orientation would have to be included in how we find the center. $\endgroup$ – Honest Abe Mar 26 '15 at 19:29
  • $\begingroup$ I noticed that someone added gis.stackexchange.com/questions/83022/… at the bottom of the wikipedia article. I was not aware of gis.stackexchange before this. $\endgroup$ – Honest Abe Mar 26 '15 at 19:47

This Wikipedia article has a quick discussion and finds the center to be near Ankara, Turkey. I would think a better point would be well inside the earth, the CM of the thin shell discussed in the article. Finding an average point on the surface of a sphere(oid) is problematic. It depends on your definition.

  • 1
    $\begingroup$ There is no magic about where you split the Mercator projection. You can split it anywhere you want, then determine the centroid of the land that is shown. If you show the whole earth, the centroid would be down in Antartica-there is infinite area down there. $\endgroup$ – Ross Millikan Jan 23 '14 at 13:59
  • $\begingroup$ Based on recent developments I have decided I won't accept an answer to this question unless it describes the full process of determining the center. You retain my upvote! ;-] $\endgroup$ – Honest Abe Mar 26 '15 at 19:38

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