Your Lines Across the Earth
For the moment you were born, every planet stood exactly overhead somewhere, and exactly on the horizon somewhere else. Those places draw lines across the map — and where you stand relative to them is the oldest form of this question: where does the world suit you.
At any instant, each planet is directly overhead at exactly one point on Earth, and exactly on the horizon along a great curve. Freeze the sky at the moment of a birth and those places become fixed lines on the map. Standing on one is traditionally held to amplify that planet's themes in the register the line belongs to. This is genuine astronomy — the same right-ascension and declination maths an observatory uses — not a symbolic overlay.
What it computes
- 01Your birth date, time and time zone fix the sky. Time matters here far more than it does elsewhere on this site: the Earth turns 15° every hour, so an hour of error moves every line about a thousand miles. The third box is the piece people skip — hours from UTC at the place and season you were born, not where you live now. New York in summer is −4 and in winter −5; London is 0 or +1; Delhi is +5.5. If you have saved that offset on Begin it is filled in for you, and the box under the fields says which of the three values came from your saved details and which the map had to assume.
- 02Each planet gets four lines. MC is where it stood at the top of the sky and IC directly underfoot — both are meridians, so they draw straight. AC where it was rising and DC where it was setting — those are curves, because the horizon depends on latitude.
- 03MC lines speak to work and public standing; IC to home and roots; AC to body and manner; DC to partnership and open opposition.
- 04Where a curve simply stops, the planet never rose or set at that latitude at all — it was circumpolar. No line is drawn rather than a false one.
- 05Below the map, the lines running within eight degrees of your chosen city are listed with what each one carries.
How to read it
Read a line you live on as a volume knob, not a verdict. It turns that planet up in that department of life — which is welcome for some planets and demanding for others. Nobody lives on no lines, and living far from all of them is its own quiet condition.
What it does not claim
Planet positions here use the site's compact formulas — excellent for the Sun, good for the Moon and Mercury, and display-grade for Venus through Saturn. Treat outer-planet lines as accurate to within a degree or two of longitude, which on the ground is tens of miles. This is a symbolic tradition applied to real astronomy: the astronomy is real, the meaning attached to it is symbolic, and no line predicts any fact about your life.
What do AC, DC, MC and IC actually mean?
A line on this map is a real place: the strip of Earth where one planet was exactly rising, setting, overhead or underfoot at the minute you were born. Standing on or near a line turns that planet's volume up in your life there — near your Venus line, Venus's business (love, beauty, what you find precious) gets loud; near your Saturn line, Saturn's business (work, weight, discipline) does.
Where does this kind of map come from?
The idea underneath this map is far older than the map itself. Classical astrology has always treated the four angles of a — the rising point, the setting point, the top of the sky and the bottom — as the places where a planet acts most strongly. A planet sitting exactly on one of those angles was called angular, and astrologers from the Hellenistic era onward ranked angular planets as the loudest voices in a chart. What this page does is simply turn that old rule inside out: instead of asking which planets were angular where you were born, it asks where on Earth each planet would have been angular at that same moment. Every planet is always rising somewhere, setting somewhere, and overhead somewhere — so every birth moment paints the whole globe.
Before computers, nobody drew these maps, because doing it by hand means recomputing the angles for thousands of locations from an . Astrologers instead used relocation charts: recast the birth chart as if the birth had happened in the new city, and read which planets moved onto the angles. The map version was popularized in the 1970s by the American astrologer Jim Lewis, who ran the calculations by computer, drew the results as lines over a world map, and named the technique Astro*Carto*Graphy — the word astrocartography comes from his coinage. His maps became one of the few genuinely new formats astrology produced in the twentieth century, and the version you see here follows the same construction: MC and IC lines straight down the map, rising and setting lines curving with the horizon.
What the tradition claims for the lines is an extension of what it claims for angular planets: live near your Jupiter MC line and Jupiter is said to color your public life there; near a Venus AC line, how you come across. Practitioners tend to say the effect is strongest within a few hundred miles of a line and fades with distance — which is why this page uses an eight-degree band around your chosen city. All of that is interpretation, and it stays interpretation here: the positions are astronomy, the meanings are the tradition talking.
Where this sits in the larger system: the AC and MC on this map are the very same Ascendant and Midheaven that anchor a natal chart — one page reads them at your birthplace, this one reads them everywhere else. How these lines braid into the letter-and-gate side of the corpus is a question the corpus leaves open, so this page keeps honestly to the astronomy and the astrological tradition.
Enter a birth date above and your lines will be drawn.
The coastlines are drawn deliberately coarse — enough land under the grid to see whether a line falls on sea or on shore, and not so precise that it invites measuring a city off it. For that, read the list below, which gives the true distance in degrees.
The astronomy here is real and checkable — the same right ascension and declination an observatory uses, and the Sun's line tracks the equation of time to within a few degrees. What is symbolic is the meaning attached to standing on a line. No line predicts a fact about your life, and none of this is medical, financial or relationship advice. Your birth data stays in your browser.