Photo : Mohammed Brzan · Pexels (libre d’utilisation)
A client once told us they moved to a city where their astrocartography map showed a Venus line, expecting love, and got a painful divorce instead. The map was not wrong. They had misinterpreted what the line meant. The difference between relocation astrology and astrocartography is simple: relocation astrology recalculates your birth chart as if you had been born in a new place, while astrocartography maps where planets were rising, setting, or culminating at your birth moment across the globe. One asks “What would my chart look like here?” The other asks “Which planetary energies cross this location, and how do they contact my natal chart?”
What each technique actually produces
Relocation astrology creates a new natal chart for a specific location. The planets stay in the same positions relative to the fixed stars (the sidereal positions change negligibly), but the house cusps shift because they depend on local sidereal time and latitude. A person born in London at noon will have a different Ascendant in Sydney at the same clock hour. The relocated chart is a full chart: houses, aspects, dignities, everything. It asks: what kind of life would you lead if your birth had happened here?
Astrocartography (also written AstroCartoGraphy) produces a world map overlaid with lines. Each line represents a place where a planet was exactly rising (AC line), setting (DC line), on the Midheaven (MC line), or on the Imum Coeli (IC line) at your birth moment. The lines are curves across the globe. No full chart is generated unless you also cast a relocated chart for a point on those lines. The lines themselves show where a planet’s energy is angular and therefore most prominent. They do not create a new chart; they indicate where the planets from your original birth chart touch the local horizon and meridian.
The root confusion between the two methods comes from assuming they tell the same story. They do not. One is a recalculation of the whole sky. The other is a geographic projection of planetary angles.
A short history of both techniques
Relocation astrology has ancient roots. Greek astrologers like Ptolemy discussed how the same birth moment produced different effects depending on where a person lived, because the Ascendant and Midheaven changed. Medieval and Renaissance astrologers used relocation charts to advise merchants moving between cities. The method was formalised in the 20th century by astrologers who applied the standard house recalculation to any location, treating it as a secondary natal chart.
Astrocartography is younger and has a single named origin. Jim Lewis developed the technique in the 1970s while working at the University of California. He combined his training in astrology with his background in cartography and computer programming. In 1978 he published AstroCartoGraphy: A New Dimension in Astrology, the first book to describe the system. Lewis used early computers to calculate the planetary lines, which had previously been too labor-intensive to draw by hand. His maps allowed anyone to see at a glance where their Sun, Moon, or Saturn was angular. The technique was popularised in the 1980s and 1990s through seminars and later through software such as Solar Fire and AstroGold.
A third related method, local space astrology, was developed around the same time by Michael Erlewine and others. Local space maps show azimuth lines (directions from a specific location to the planets), not global lines. It is often confused with astrocartography but serves a different purpose: where astrocartography shows where to move, local space astrology shows which direction to face within a single location.
What the lines mean versus what the chart means
In astrocartography, each planet line carries a specific quality. A Jupiter MC line suggests professional expansion and visibility. A Saturn IC line points to home boundaries and emotional weight. But these lines are not guarantees. They only indicate that the planet is angular. The actual effect depends on the condition of that planet in the birth chart (its sign, aspects, house) and on how the line contacts the natal chart when you cast a relocated chart for that point.
The relocated chart, by contrast, gives the complete picture. It shows not just one angular planet but the entire web of houses and aspects. A relocation chart for a point on a Venus line might still have Mars in the 7th house, which the Venus line alone does not reveal.
Practitioners who rely only on astrocartography lines often miss the full story. The line is a signal, not the sentence. That is why an experienced consultant always casts a relocated chart for any place under serious consideration. The line tells you what to look for. The chart tells you what you will get.
When to use each method
Relocation astrology is the tool for permanent or long-term moves. If you are choosing a city to live in for years, you need the relocated chart. It shows the house placements of your planets, the angularity of the house cusps, and how the chart compares to your birth chart. The Ascendant in a relocated chart can change dramatically, altering your self-presentation and life path. The Midheaven shift reshapes career. The relocated Moon changes emotional needs and domestic patterns.
Astrocartography is better for travel, short stays, and geographic diagnosis. If you visit a place and feel unexpectedly depressed or euphoric, the astrocartography map explains why: you are on a Saturn or Pluto line, or perhaps a Jupiter line. The technique is also useful for relationship work: couples can compare their lines to see where both have positive angular planets, suggesting cities where both can thrive. But the map alone does not replace a full chart.
Many astrologers use both in sequence. First, the astrocartography map highlights promising bands of planetary energy. Then, a relocation chart is cast for a specific city within that band. The relocation chart reveals whether the house placements confirm or contradict the promise of the line.
Symbolism: the planetary lines as thresholds
The lines on an astrocartography map are not arbitrary. They mark places where a planet stood on the four cardinal angles: the Ascendant (rising), the Descendant (setting), the Midheaven (zenith), and the Imum Coeli (nadir). In ancient astrology, the angles were the most sensitive points in a chart. A planet exactly rising or culminating was considered powerful, even overwhelming. The lines transfer that angular power to a geographic location.
Relocation charts do not carry that geographic symbolism in the same way. A relocated chart treats the new location as a local horizon. The angles are still the angles, but they are not tied to a specific planet’s line across a world map. Instead, the symbolism comes from the shifted house system: planets move into new houses, and that changes the areas of life they influence.
There is a subtle difference in worldview. Astrocartography sees the Earth as a grid of planetary lines, a kind of astrological ley system. Relocation astrology sees each location as a unique mirror of the sky above it, as if you had been born under that sky. The first is topographical. The second is situational.
Common misconceptions
Misconception 1: Astrocartography and relocation astrology are the same thing. They are not. One produces lines, the other produces charts. They answer different questions and require different calculations.
Misconception 2: A line guarantees a specific outcome. A Venus line does not guarantee love. It means Venus is angular, which can manifest as anything from beauty to relationships to money to vanity. The specific expression depends on the rest of the chart and on the person’s choices.
Misconception 3: The lines stay fixed for life. They do. The planetary positions at your birth do not change. But your response to a line can shift as you mature. A Saturn line that felt crushing at twenty may feel grounding at forty.
Misconception 4: Relocation astrology replaces the birth chart. It never does. The birth chart remains the root. The relocated chart is a secondary layer. Major transits and progressions are still calculated from the birth chart. The relocated chart adds nuance but does not override.
FAQ
Can I use relocation astrology and astrocartography together? Yes. Use astrocartography to identify promising bands, then cast a relocation chart for a specific city within that band to confirm the house placements.
Which is more accurate? Both are accurate for their own purposes. Relocation astrology gives a more complete picture. Astrocartography gives a faster geographic overview. They complement, not compete.
Do the astrocartography lines move if I move? No. The lines are fixed to your birth moment. If you move to a new location, you simply check which lines pass through that new location. The lines themselves do not shift.
Is astrocartography only for the natal chart? Jim Lewis designed it for the natal chart, but it can be applied to any event chart: a business founding, a wedding, a relocation chart itself. Some practitioners use it for electional astrology to choose a moving date.
Closing
The difference between relocation astrology and astrocartography is not a matter of preference. It is a matter of precision. One technique maps the planetary lines across the Earth. The other recasts the sky above a single point. The best work uses both. For a deeper look at how to read your own lines, see our guide to reading your astrocartography map. The full history of the method can be found in our astrocartography vertical hub. And if you need to understand the foundation chart before exploring relocation, the glossary entry on the natal chart is a good place to start.