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I am referring to Point Nemo which is the point farthest from any emerged land mass. Some relevant information can be found on this page.

I am not sure about -ve signs or whether it is the exact location, but using Google:

pointNemo = GeoPosition[{-48.52, -123.23}] 

GeoGraphics[{pointNemo
  , GeoMarker[{pointNemo}]
  , GeoDisk[pointNemo, Quantity[2700, "Kilometers"]]
  }
 , GeoRange -> Quantity[3500, "Kilometers"]
 , GeoProjection -> "Orthographic"
 ]

enter image description here


Question(s)

  1. Using the Geo* functions in Mathematica, how can the farthest point from any land mass be calculated?

  2. What is the closest land mass to Point Nemo?

  3. How do I put a label/callout at both these locations?

I am thinking, "why not move this point upwards, since there seems to be plenty of ocean there"?

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1
  • $\begingroup$ A related community post. $\endgroup$
    – Syed
    Feb 29 at 3:18

1 Answer 1

4
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$Version

(* "14.0.0 for Mac OS X ARM (64-bit) (December 13, 2023)" *)

Clear["Global`*"]

Wolfram does not include all "emerged land" in its data base so its data cannot be used to calculate Point Nemo. See Motu Nui

motunui = GeoPosition[{-27.12, -109.27`}];

pointNemo = GeoPosition[{-48.52, -123.23}];

GeoGraphics[{GeoMarker[{pointNemo, motunui}], 
  GeoDisk[pointNemo, Quantity[2700, "Kilometers"]]},
 GeoRange -> "World",
 GeoProjection -> {"Orthographic", "Centering" -> pointNemo},
 GeoGridLines -> Automatic]

enter image description here

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2
  • $\begingroup$ How about Entity["AdministrativeDivision", {"IslaDePascua", "Valparaiso", "Chile"}] and Entity["Country", "PitcairnIslands"]? $\endgroup$
    – Syed
    Feb 28 at 8:26
  • 1
    $\begingroup$ @Syed - see lukatela.com/pointNemoRevisited/index.html $\endgroup$
    – Bob Hanlon
    Feb 28 at 21:04

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