Several mundane astrologers of note, such as Sepharial and Johndro, have developed a different astro-locality mapping technique which uses a symbolic projection of the zodiacal signs onto bands of longitude around the Earth. Typically the 0º Aries point is projected onto the Greenwich meridian (0º of longitude), and the sign divisions fall every 30º around the equator in an eastward direction, although the anchor point and direction are sometimes varied (and these are offered as options in Solar Maps). This projection method is often used in the astrology of national and international politics and events, using charts of nations and cities. It produces maps which are very similar in appearance to Astro*Carto*Graphy® maps, but the positions of the planets and their corresponding Planet/Angle lines are symbolic only, and do not show their true positions on the Earth’s surface. It is possible to view any chart using this method by selecting the “Zodiac” option from the “Chart” menu of Solar Maps.
In addition, each place on earth has a unique longitude and latitude correspondence. This technique is especially useful when doing maps for people with unknown birth times. For example, the Geodetic angles for Washington DC are 14 CP 57 on the MC and 23 Li 09 rising. Therefore, any planets in those degrees would appear angular, regardless of the time of birth of the individual.
See for further information Primary Directions in Solar Fire.
