Is this astrocartography map free?

Yes. The map is free and needs no sign-up. The lines are computed in your browser; only the place name you type is sent, to look up its coordinates and time zone, and nothing is stored.

How are the lines calculated?

From each planet's right ascension and declination at your birth moment and the sidereal time at Greenwich. The overhead line is the longitude where local sidereal time equals the planet's right ascension. The rising and setting curves come from the hour angle at which the planet crosses the horizon at each latitude. Positions use the tropical zodiac and the geometric horizon.

Why do the curves stop near the top and bottom of the map?

Far north and far south, some planets never rise or set on a given day, and the rising and setting curves bunch together. The map draws them between 66 degrees north and south, where they are easiest to read.

Can I use the map without a birth time?

No. Every line depends on the time, so the map asks for it. If you do not know your time, the rest of your chart can still be read from a free birth chart, without the angles and houses.

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Astrocartography map

Your planetary lines on a world map: where each planet was overhead, underfoot, rising or setting at the moment you were born.

An astrocartography map shows where on Earth each planet in your birth chart was on one of the four angles at the moment you were born: rising, setting, overhead or underfoot. Enter your birth date, time and place above and the map draws every line for you, free and without an account.

Each planet gives four lines. The overhead and underfoot lines run straight from north to south; the rising and setting lines curve, because how early a planet rises depends on your latitude. Astrocartographers read a place near a line as one where that planet's themes come forward.

How to read your map

Start with the planet, then the angle. The planet says what comes forward: Venus is affection, ease and pleasure, Jupiter growth and generosity, Saturn effort and structure, Mars drive and friction. The angle says where it shows up.

Hover or tap a line to see its name and the nearest city on our list. The table under the map lists the same lines as text, so you can read every one without pointing at the map.

Midheaven (MC): the planet was overhead. Traditionally read as career, reputation and public life.
IC: the planet was directly underfoot, on the far side of the Earth. Read as home, family and roots.
Ascendant (AC): the planet was rising. Read as how you come across and how you feel in your own skin there.
Descendant (DC): the planet was setting. Read as partners, close friends and the people you meet.

How close is close enough?

There is no fixed rule. Many astrocartographers treat a few hundred kilometres either side of a line as its strongest zone, fading with distance. That is why the list shows the distance in kilometres and miles instead of a yes or no.

A place with no line nearby is not empty. It is read as neutral ground, where your birth chart works as it always does.

Why your birth time matters

The Earth turns 15 degrees of longitude every hour, so the lines move with it. A birth time that is half an hour out shifts every line by about 7.5 degrees, which can be several hundred kilometres. If you only know the time roughly, read the map as a broad picture and check the exact time on a birth certificate or hospital record if you can.

What to do with it

Use the map as a way to think about place, not as a forecast. If a move, a long trip or a study year is on your mind, look at which lines pass near the places you are already considering, and ask whether that planet's themes fit what you want from the time there.

To rank cities by a goal such as love, career or home, use the best place to live finder. For one planet at a time, start with the Venus line or the Jupiter line.

Common questions

Is this astrocartography map free?: Yes. The map is free and needs no sign-up. The lines are computed in your browser; only the place name you type is sent, to look up its coordinates and time zone, and nothing is stored.
How are the lines calculated?: From each planet's right ascension and declination at your birth moment and the sidereal time at Greenwich. The overhead line is the longitude where local sidereal time equals the planet's right ascension. The rising and setting curves come from the hour angle at which the planet crosses the horizon at each latitude. Positions use the tropical zodiac and the geometric horizon.
Why do the curves stop near the top and bottom of the map?: Far north and far south, some planets never rise or set on a given day, and the rising and setting curves bunch together. The map draws them between 66 degrees north and south, where they are easiest to read.
Can I use the map without a birth time?: No. Every line depends on the time, so the map asks for it. If you do not know your time, the rest of your chart can still be read from a free birth chart, without the angles and houses.

Go deeper

The lines are computed in your browser with astronomy-engine: apparent right ascension and declination of date and Greenwich apparent sidereal time. Midheaven longitude = right ascension − sidereal time; IC = Midheaven + 180°; rising and setting curves from cos H = −tan(latitude) × tan(declination) on the geometric horizon, sampled every degree of latitude between 66° north and south. Distances are great-circle distances to the nearest point of each line. Land outline: Natural Earth 1:110m (public domain). See the editorial policy.