Topocentric system - Method of house division, proposed by Polich and Page, which is capable of calculating house cusps for any place on earth.
At time of writing (2001), the Topocentric system was yet promoted as "an improvement on Placidus" and "the only (quadrant) method that works" in the Arctic. Neither assertion could be further from the truth.
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The geometry is somewhat complicated and the reader is referred to this site for an explanation. The topocentric system can also be described as the an approximation algorithm for the Placidus system.
 See also: Natural, Direction, Horoscope, Equator, Ecliptic
  
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