Skip navigation
5792 Views 9 Replies Latest reply: Feb 15, 2012 9:03 AM by MikeArmstrong RSS
Copper 665 posts since
Dec 30, 2007
Currently Being Moderated

Jan 18, 2005 12:00 AM

The Geographic Center of the World

If you've ever wondered where the geographic center of the world's land area is, the coordinates are latitude 34 deg 26 min North and longitude 27 deg 19 min East. This puts it in the eastern Mediterranean Sea about halfway between Athens and Alexandria. In tribute to these centers of ancient Greek civilization, the geographic center of the world's land area will be designated "Mesogeos".

The Mathcad 11 worksheet to determine the location of Mesogeos and a brief technical explanation are attached. The worksheet is set up to automatically download a 10 minute resolution world map. A 5 minute resolution map is available but working with it can strain both system resources and one's patience.

An equal-area projection centered on Mesogeos (red x) follows. The country closest to the antipode of Mesogeos is New Zealand and so, like an object too close to a black hole, it gets cruelly distorted.

  • ptc-1368288 Copper 15,155 posts since
    Nov 15, 2007
    Currently Being Moderated
    Jan 18, 2005 12:00 AM (in response to ptc-3260442)
    The Geographic Center of the World
    Reading some more ancient literature, the center of the earth mass was at the great pyramid. Maybe they made the antarctic a bit too big. And that is interesting, because Antlantis is in that area. We don't see it anymore because under the sea.

    jmG
      • Copper 287 posts since
        Jun 9, 2005
        Currently Being Moderated
        Sep 9, 2005 12:00 AM (in response to ptc-3260442)
        The Geographic Center of the World
        More interesting you've where the geographic center of the pyramids and "stones":

        the coordinates are latitude 18 deg 8 min North and longitude 99 deg 33 min West ( 40 miles from Mexico City ). This is "sun fire pyramid" from 07/25/2005 "tzolkin zero".

        You center should surface from "babilonian"
        the geographic center , the coordinates are latitude 32 deg 48 min North and longitude 44 deg 48 min East.

        Giza, the coordinates are latitude 29 deg 88 min North and longitude 31 deg 69 min East.

        "black stone", the coordinates are latitude 21 deg 48 min North and longitude 39 deg 78 min East.

        Have you better coordinates? Then write are.
      • StuartBruff Platinum 4,728 posts since
        Jun 1, 2007
        Currently Being Moderated
        Sep 11, 2005 12:00 AM (in response to ptc-3260442)
        The Geographic Center of the World
        On 1/18/2005 6:52:33 AM, Paul_W wrote:
        >More important [for centre of area] over the span of human history would be changes in sea level.

        For your follow on worksheet, how does the centre of area change is you use actual area as opposed to projected (onto mean sea level) area?

        Stuart
  • Tezza2010 Bronze 26 posts since
    Dec 4, 2010
    Currently Being Moderated
    Feb 15, 2012 8:44 AM (in response to ptc-3260442)
    Re: The Geographic Center of the World

    This depends on the bounds you to set to define the problem in the first place.  If you take the last 15 degree of arc off the west edge and add it to the east edge.  The calculation changes????  Same applies to north south direction.  The answer depends on your arbitary start view of the 2D coordinate set. 

     

    Start pont is arbitary and is just a "convention" for practical reasons that poles are 90 lat, and 0 E/W passes through a particular point so east west limits on projection are 180E, 180W.  This does not need to be.  Change this convention and answer would be different.

     

    Very Europe centric answer.  Near the centre of the arbitary bounds.  You could make it Indian, NEMA, Latin American, South East Asian, Polynesian or even Bermuda centric by changing the start view.  Please play the "lost in space" theme at this point.

     

    The 2D coincidence in the med is only the arbitary start.  The real 3D centroid based on area at the surface exclusive of convention would be kinda hot.

More Like This

  • Retrieving data ...

Bookmarked By (0)