Astrocartography

Place in astrological thought before the twentieth century

The Internet Encyclopedia of Philosophy entry on Hellenistic astrology says that assigning geographical regions to zodiac signs, which it calls astro-chorography, appears as early as Teukros of Babylon and Manilius. It adds that Ptolemy's assignments in Book 2 of the Tetrabiblos differ significantly from those of Dorotheus, Teukros, Manilius and Paulus Alexandrinus, and presents the practice as one response to the sceptic Carneades, who argued that differences among peoples counted against astrological fatalism. The author is not named on the page retrieved.

In the Loeb Classical Library edition of the Tetrabiblos (1940), Book 2, section 3 links countries to the four triangular groupings of signs and to planetary rulers according to directions of the winds, dividing the inhabited world into quarters. This is a scheme for regions and peoples, which the IEP describes as enabling predictions for groups. It is not a method for placing one person's birth chart on a map.

Twentieth-century locational systems

Martin Davis, an astrologer writing on the Skyscript site, says that Jim Lewis developed Astro*Carto*Graphy, began the work in the 1970s and introduced it publicly in 1976. Davis names Lewis's teacher Donald A. Bradley, Roy Firebrace, Marc Edmund Jones and Gary Duncan as figures in its original conceptualisation, and says Lewis launched Cyclo*Carto*Graphy, which maps transits and progressions, in 1982. These dates come from a practitioner source and were not checked against Lewis's own publications.

A bibliography of locational astrology compiled by Philip Graves for the Astrolearn library, dated May 2025, lists earlier book-length works on the subject. They include L. Edward Johndro's The Earth in the Heavens (1929), Paul Counsil's X Marks My Place (1935) and Charles Jayne's Introduction to Locality Astrology (1978). Graves says the list is selective. The sources reviewed do not establish how far these systems influenced one another or Lewis.

Popularisation and legacy

In a 2017 episode of The Astrology Podcast, Moses Siregar describes locational astrology as a relatively recent development in the astrological tradition, credits Cyril Fagan with early mid-century work and says Lewis later popularised it. In a 2023 episode, Chris Brennan and Helena Woods say Lewis was inspired by Bradley's work on mundane astrology charts in the 1950s, and give 1995 as the year of Lewis's death. A book bearing his name, The Psychology of Astro*Carto*Graphy, is described as remaining in print. These are accounts by astrologers, not archival history.

Names and spellings

Davis and the podcast speakers write the founder's name for the method with asterisks, as Astro*Carto*Graphy, abbreviated A*C*G or ACG. Siregar calls it Lewis's own branded method, and the unbranded terms astrocartography and locational astrology are used more widely. Davis describes his own field as astrolocality astrology. Whether these labels are interchangeable is a matter of usage, and the sources reviewed do not set a standard.

Related techniques that are not the same

Davis says the technique evolved from earlier relocated charts, in which the birth coordinates are changed while the date and time are kept, showing how planets move through the houses of the chart. He describes two ways of using the maps, either as an independent tool for planetary angularity in mundane astrology or as an overview of relocated charts, and defines a paran as a crossing in space between a meridian line and a horizon line.

Siregar lists three locational approaches: the Lewis method, relocated chart analysis and local space calculations. Astrodienst's help pages note that comparing a map with a relocated chart is tricky, because the maps take account of planetary latitude and charts do not. Similar words do not make these methods equivalent.

Relation to natal astrology

This page covers the map technique only. Natal astrology, in which a chart for one birth place is read through signs, houses and aspects, and the wider history of astrology are covered in the separate article on astrology. Findings about natal chart reading appear here only where they bear on assumptions that the maps share.

How a map is constructed

Davis describes four angular positions mapped for each planet: Midheaven (MC) and Imum Coeli (IC) as vertical lines, and Ascendant (ASC) and Descendant (DSC) as curved lines. In his account of Lewis's interpretations, the MC relates to career and status, the IC to roots and security, the ASC to personal identity and the DSC to partnerships. These are practitioners' associations and not measured properties of places.

Astrodienst states that its maps show a wide orb of about 150 miles (240 km) east and west of each line and that they cannot answer questions at smaller scales. It also says the maps use the real positions of the planets on the sky, so planets with considerable latitude behave differently than the chart alone would suggest.

Reading the lines with a consultant

Davis says Lewis used various orbs, at times 300 to 400 miles and at other times up to 700 miles (1000 km). On The Astrology Podcast, Woods describes Lewis's orbs as 7 or 8 degrees, about 700 miles, with intensity increasing nearer the line. She advises looking at the natal planet before going to a line, and says one paran can offset a supportive line. Brennan and Woods both rely on personal experience and recommend recording observations.

A 2018 Refinery29 article, written for a general audience, says free map generators exist and quotes an astrologer recommending a one-to-one reading for a clearer idea. The same astrologer says that results may be subtle and that a map should not be the only factor in choosing a destination. The sources reviewed do not report typical session length, fees or format.

Dependence on birth time

Because the lines are positioned by the Earth's rotation at the moment of birth, accuracy depends on the recorded time. Astrodienst states that within 5 minutes a line shifts by around 60 miles, and that an uncertainty of 15 minutes reduces the spatial resolution to approximately 400 km east and west. A rounded or misremembered birth time therefore moves the lines, which is a limitation acknowledged by the map provider itself.

Relocation, travel and reflection

Practitioners describe the maps as showing how different places accent a chart, so that a line is read as raising a given planetary theme in that region. The 2018 Refinery29 article presents them as a way for travellers to consider how planetary influences might affect them in various parts of the world. Astrodienst's help pages add that readers should consult their own feelings about a place. The sources reviewed do not report how often people move or travel because of a map, or with what outcome.

Illustrative applications

Davis applies the maps to the chart of a British prime minister in relation to the 1982 Falklands conflict, to the national chart of the United Kingdom and to the chart of Mahatma Gandhi in relation to India. He presents these as illustrations of how lines resonate with events. The page reports no formal test, no comparison with places that lack such lines and no counts of cases that did not fit.

Studies of the maps themselves

No controlled test of astrocartography maps was found. A PubMed search run for this draft on 5 October 2026 for astrocartography, astrological geography or relocation astrology returned three records, all historical items on early modern New Spain or a medieval scholar, none testing map readings. A general web search for tests also found none, Davis's article reports no tests, and Dean's 2016 survey of three decades of controlled testing of astrology, as read, does not mention locational astrology. Other databases were not searched. Absence of tests is not evidence that the technique does or does not work.

Tests of related natal-chart claims

Dean reports hundreds of controlled tests of astrology and says 69 studies of matching charts to personality or case histories gave overwhelmingly negative results, with correlations close to zero. In a double-blind study of 52 college students, participants could not pick out their own computer-generated natal chart summary from a bogus one, although they did identify their personality inventory profile at better than chance, and a Barnum effect was seen in ratings of both.

A 2024 online study by Greenberg and Ferretti asked 152 astrologers to match 12 subjects' biographies to one real natal chart among five. The mean was 2.49 correct out of 12, against 2.4 expected by chance. A post hoc analysis of 17 verified professionals found slightly higher scores. The study was not peer reviewed, and the authors note limits. These tests used natal charts, so they do not show whether place-specific readings predict anything.

Statistical work on planets at rising and culmination

The maps draw lines where planets were rising or culminating, positions studied by the Gauquelins. Dean says they found a tendency for eminent professionals to be born when the planet matching their field had just risen or culminated, but that the effect averaged only r = 0.04, was significant only in large samples, and may reflect misreported birth times. That question concerns the time of birth, not where a person later lives, so it does not test the maps.

Decisions about moving and travel

The sources reviewed report no adverse-event data for astrocartography and no study of outcomes after relocating. The astrologer quoted by Refinery29 says a map should not be the only factor in booking travel, and Astrodienst advises readers to consult their own feelings about a place. Because lines span hundreds of miles and depend on the birth time, a map offers little detail for choosing between specific towns, which is a limit the provider itself states.

Psychological considerations and care boundaries

A 2022 scoping review of belief in astrology found associations with thinking style, self-concept verification and stress, and described case reports of excessive engagement termed fortune-telling addiction, with distress, cravings and salience. The authors say further research is needed, and the review was not specific to astrocartography. A reading is not a medical or psychological assessment and should not delay or replace necessary care. Persistent distress, or health concerns linked to a place, warrant assessment by a qualified clinician.

Practitioner standards

No statutory regulation or training standard specific to astrocartography was found in the sources reviewed. The National Council for Geocosmic Research, a United States astrological body, publishes a code of ethics, revised in October 1998, under which astrologers provide services within the boundaries of their competence, make predictions only from a conscientious application of technique, avoid manipulating clients' feelings and respect confidentiality. The code as read did not mention medical advice, and it binds only that organisation's members.