The one hundredth anniversary of Robert Peary’s controversial North Pole claim was in April 2009, and the centennial of Roald Amundsen’s undisputed dash to the South Pole is coming up in December 2011. Much less known are the “poles of inaccessibility” (PIA), which are distinguished by their great distances from any coast (Stefansson, 1920). As 50% of humanity lives within 200 km of the coast, such remote points are particularly difficult to reach. In addition to numerous local maxima, there are two global maxima of particular interest: the Eurasian PIA, representing the land-locked point farthest from the ocean, and the South Pacific PIA, being the most remote oceanic point. The Eurasian PIA has been called the “Center of the Earth” (CE), and it was “conquered” in 1985 by Richard and Nicholas Crane during a bike journey across the Himalayas (Crane and Crane, 1987). However, recent calculations have placed the CE considerably further south (Garcia-Castellanos and Lombardo, 2007). The oceanic PIA is more elusive and was only recently named “Point Nemo” (Lukatela, 2005) after the globetrotting captain in Jules Verne’s classic 20,000 Leagues Under the Sea.

Wessel, P. 2010. Exploring the ends of the Earth. Oceanography 23(3):176–179, https://doi.org/10.5670/oceanog.2010.32.

ADD Consortium. 2000. Antarctic Digital Database, Version 4.1. Database, manual and bibliography. Scientific Committee on Antarctic Research, Cambridge, UK, 93 pp.
1. Crane, R., and N. Crane. 1987. Journey to the Center of the Earth. Bantam Press, London, ISBN 0-7089-1928-6, 238 pp.
2. Garcia-Castellanos, D., and U. Lombardo. 2007. Poles of inaccessibility: A calculation algorithm for the remotest places on Earth. Scottish Geographical Journal 123(3):227–233. [CrossRef]
3. Lukatela, H. 2005. Point Nemo. http://www.globecalc.com/ptnemo.
4. Müller, R.D., M. Sdrolias, C. Gaina, and W.R. Roest. 2008. Age, spreading rates, and spreading asymmetry of the world’s ocean crust. Geochemistry, Geophysics, Geosystems 9, Q04006. [CrossRef]
5. Hammond, S., J. McDonough, and C. Russell. 2010. Box 5: The NOAA ship Okeanos Explorer: New ways for exploring the ocean. Oceanography 23(1):88–89. [pdf]
6. Renka, R.J. 1997. STRIPACK: Delauney triangulation and Voronoi diagram on the surface of a sphere. ACM Transactions on Mathematical Software 29(3):416–434. [CrossRef]
7. Smith, W.H.F. 1993. On the accuracy of digital bathymetric data. Journal of Geophysical Research 98(B6):9,591–9,603.
8. Soluri, E.A., and V.A. Woodson. 1990. World vector shoreline. International Hydrographic Review LXVII(1):27–35.
9. Stefansson, V. 1920. The region of maximum inaccessibility in the Arctic. Geographical Review 10:167–172. [CrossRef]
10. Wessel, P. 2003. Compression of large data grids for Internet transmission. Computers & Geosciences 29:665–671. [CrossRef]
11. Wessel, P., and W.H.F. Smith. 1996. A global, self-consistent, hierarchical, high-resolution shoreline database. Journal of Geophysical Research 101(B4):8,741–8,743.
12. Wessel, P., and W.H.F. Smith. 1998. New, improved version of Generic Mapping Tools released. Eos, Transactions, American Geophysical Union 79(47):579. [CrossRef]

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