HOUSE SYSTEMS: Houses are a division of the space surrounding the Earth. The purpose of any house system is to divide space into sectors. The main division mirrors the concept of day and night. Since daylight and nighttime differ by season and location, houses can be of different sizes. There are three categories of house division: Direct, Projection and Intersection. Pathfinder supports the ten most popular house systems.
The Projection type system includes many of the favorites because it ties the "great circles" framework into the chart, but it can astronomically fail at high Northern or Southern Latitudes. The Intersection house system is based on the same premise as the Projection type, but it adds an additional calculation for the intermediate houses . The Direct type of house system seldom fails astronomically but it does not tie the great circle into the chart.
ARC(Arcturan): (Projection type) Seems to do well in polar zones
Campanus: (Projection type)
Equal/Ascendant: (Direct type) Each house is 30° and all cusps are equal to the Ascendant.
Equal/Midheaven: (Direct type) Each house is 30° and all cusps are equal to the Midheaven.
Koch: (Intersection Type) "Dome" and "The Only Way" (also the Swiss Huber method) prefer this house system.
Meridian: (Projection type)
Placidus: (Projection type) With Koch, probably the most popular system used by Western Astrologers.
Porphyry: (Direct type)
Regiomontanus: (Projection type)
Topocentric: (Projection type)
TYPES OF ZODIAC:
Tropical: The Tropical Zodiac begins at 0° Aries, an imaginary point where the Sun's
path intersects the celestial Equator; this usually occurs on or about March 21st.
Most Western Astrologers use the Tropical Zodiac.
Sidereal: The Sidereal Zodiac is based on the position of the edges of the stellar constellations. By 1997 the 0° Aries Point has precessed (gone backwards) to early
degrees of Pisces. Most Eastern (India and Asia) Astrologers use the Sidereal Zodiac.
TYPES OF CHART PRINT-OUTS:
Professional - Especially designed for the Professional Astrologer. Prints the chart and the client's biographical information all on one page.
Friendly - For the Non-Astrologer. Prints the chart as well as the meaning of the glyphs
of the planets and signs of the zodiac all on one page.
Charts only - Prints one large chart on one page.
Dome - Based on the work of Edwin C. Steinbrecher. Prints the "Alien Patterns" (specific planetary placements or absences of planets often producing highly specialized individuals) and "decant" aspects (planets in aspect in same 10 degrees).
The Only Way - Based on the series of books "The Only Way to...Learn Astrology" (six volumes) by Marion D. March and Joan McEvers. Displays and prints charts with proportional spacing of house cusps, orbs as recommended by March and McEvers as well all possible ways of moving the chart forward (Secondary Progression, Solar Arc Direction, Transits, Solar and Lunar Returns) and Comparison and Composites. All available on bi-wheel.
Astro - Based on the works of John G. Woodsmall.
Far - Based on the Financial Astrology System by Raymond Merriman.
Kepler - Allows interface with the Kepler Astrology System of David Cochrane.
Euro-Style - Displays and prints the astrological wheel as used by the Huber method and in many European countries; includes the graphic linking of aspects in the wheel.