Preliminary representation of world population by spherical harmonics.

Tobler, W · Proc Natl Acad Sci U S A · 1992

other · Level V

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Abstract

The geographical arrangement of people on the surface of the earth is approximated by a mathematical equation of 361 terms. This is a convenient form for comparison with other distributions and for use in global change studies, and it has other advantages, but it must be considered preliminary because of data limitations.