What Is Astrocartography? How to Read Your Map, Line by Line

Astrocartography lays your birth chart over a map of the world: it takes the sky at the moment you were born and shows where on Earth each planet stood out. If some cities felt light from the first day while others never quite fit, this is one way to look at the difference. Below: what the lines mean, how the map is calculated, and what this reading can and cannot do.

What is astrocartography?

Astrocartography is a mapping method that shows where in the world the planets of your birth chart move into a strong position. A birth chart is drawn for one place, the city where you were born; that city's horizon sets the corners of the chart. Astrocartography asks: had you been born at the same minute in another city, which planet would have been on a corner?

The answer changes from city to city, because the Earth turns. If the Sun was overhead in New York when you were born, at that moment it was still climbing in Los Angeles and had long since set in Delhi. Astrocartography joins up the places where each planet reaches a corner and draws them as a line. The result is a world map crossed by lines, each belonging to one planet.

The method goes back to the American astrologer Jim Lewis, who developed it in the 1970s under the trademarked name Astro*Carto*Graphy. Similar ideas existed before; Lewis made them readable on a world map. You will also see the broader labels locational astrology and relocation astrology.

Why do some places feel like home?

Most of us have a place like this. A seaside town you visited once that still comes to mind. A city you lived in for years and never called yours. A country you have never seen whose name still stirs something. Most of it has ordinary explanations: the climate, your life at the time, who you were with.

Astrocartography does not replace those explanations; it adds one. Say the city you lived in for years falls near Saturn at the bottom of your chart, the point of home and roots. That does not mean the city was "bad for you." It is a way of saying your bond with the place was heavy, full of responsibility and built slowly. That language helps you name why things felt as they did. It is not a verdict on what comes next.

Is it coincidence? Honestly, nobody can measure that, and we do not claim to. Astrocartography offers a second reading, not a measurement. If your scattered impressions of places fall into some order next to your chart, the method has done its job. If not, you have lost nothing.

What do the lines on an astrocartography map mean?

Every line combines a planet and an angle. The angles are the four main points of a chart: top, bottom, east and west, known as the Midheaven (MC), IC, Ascendant (AC) and Descendant (DC). A line shows where on Earth that planet was exactly on that angle.

• MC line (the top): visibility, work, reputation. The planet is at its highest point over that city. How you are seen from outside.
• IC line (the bottom): home, roots, family. The planet is directly beneath your feet. Where you belong; private life.
• AC line (the east): how you show up. The planet is rising there. Your energy and the first impression you leave.
• DC line (the west): relationships. The planet is setting there. The people you meet and partner with.

The pattern is simple: the same planet colors your work on its MC line, your home on its IC line, you yourself on its AC line and the people across from you on its DC line. On most maps MC and IC lines run straight north to south, while AC and DC lines curve.

A line looks thin as a thread, but in practice it is a band. A planet counts even a few degrees short of the angle; that margin is called the orb, and the calculation section says how wide it is. To see your own lines, Linalux draws them over a world map in Star Map.

What does each planet line mean?

The angle tells you which area of life; the planet tells you how it is colored. The seven classical planets cover most readings:

The outer planets (Uranus, Neptune, Pluto) draw lines too, with more generational themes; this article stays with the classical seven.

The Moon line is the one people ask about most. In a birth chart the Moon describes your needs, your habits and what makes you feel safe, so tradition reads Moon lines as places where "I am at home here" comes easily. The Moon IC line, on the point of home and roots, is linked with cities that feel like a second hometown. If the place where you always relax is near your Moon line, that is not proof, but it is a good likeness.

How is your astrocartography map calculated?

Whichever tool you use, the process has four stages:

1. Your birth details are taken.

   Date, time and place. Time matters most: a four-minute difference shifts the top of the chart by about one degree.

2. The sky at your birth is calculated.

   Each planet's position is found from an ephemeris, the table of the planets' actual positions in the sky.

3. Each city's distance to the angles is measured.

   For each city, the calculation finds how close each planet was to the top, bottom, east or west of the chart.

4. The close ones are read.

   If a planet is close enough to an angle in a city, that city counts as on that line, and the pairing of planet and angle is interpreted.

Linalux does one thing differently. Classic astrocartography draws lines on a map, and you find your city by eye. Linalux works by angularity: it measures in degrees how close each planet is to an angle. It starts from the sidereal time of your birth (the sky's own clock, showing how far the sky had turned over your birthplace) and each city's coordinates. If the orb is within 7 degrees, the city counts as on that line. Mathematically this is the same information as a line map, delivered as a list of cities. Instead of judging by eye whether Lisbon is on your Venus DC line, you read it directly.

To be fair, free tools draw the map correctly. Free tools draw the map; Linalux reads it, creating your reading with AI from your calculated chart. The calculation uses astronomy-engine, an open-source library (MIT license) accurate to within about one arcminute, a sixtieth of a degree. Astrology reads at the level of signs and degrees, so that is more than enough: a line is a calculation, not a guess. Life Atlas shows the same calculation shaded by theme.

What is it good for, and what is it not?

Reading the places you have been alongside your map adds meaning to the past too. You do not have to go anywhere; staying put and looking at the map is usually enough.

Common questions

If you would like to see your own map

Everything here is general. Which city falls on which line for you is calculated from your birth details. Linalux's astrocartography reading shows which cities are on which lines and what each line means, in a reading created with AI from your calculated chart.

See which cities are on your lines

For the lines on a map there is Star Map; for the world shaded by theme, Life Atlas. Not thinking about a subscription? The daily horoscope is free every morning, no subscription required.

Everything on Linalux is for entertainment and personal reflection. It is not medical, legal, psychological or financial advice.