Astrocartography lines, explained
Every line on an astrocartography map marks the places where one planet was on one of the four angles at the moment you were born. Here's what each kind of line means, how to read them, and what every planet line says.
What a line is
Take the moment you were born and look at the whole Earth at once. Somewhere each planet was rising on the eastern horizon, somewhere it was setting in the west; along one meridian it stood at the top of its daily arc, and along the opposite one at the bottom. Join up those places and you get four lines per planet. Ten bodies, the Sun and Moon included, make forty lines before the asteroids and the nodes come in.
Astrocartography reads a planet on an angle as loud: its themes come up in daily life more than they would elsewhere. The angle decides where they come up.
The four angles
- MC, the Midheaven
- The top of the sky. Public life: work, reputation, what you're known for. MC lines run straight from pole to pole.
- IC, the Imum Coeli
- The bottom of the sky. Home, family, roots and the life nobody sees. The IC line is the MC line's twin, half a world away.
- ASC, the Ascendant
- The eastern horizon. You: your body, your manner, how strangers take you. Rising lines curve across the map.
- DSC, the Descendant
- The western horizon. Other people: partners, close friends, clients, rivals. The setting line mirrors the rising one.
How to read the map
Start with the lines near places you actually care about, not the ones crossing countries you'll never visit. A line is a band rather than a wall: in Zenith Map's scores it counts in full on it, about 60% at 250 km and not at all past 1,000 km.
Then look at what else is nearby. A Venus line with a Saturn line 200 km away isn't the same as a Venus line on its own, and where two planets are on angles at the same latitude, a paran, the two get read together.
Read the planet in the natal chart before trusting its line. A Jupiter that's badly placed at birth won't turn generous because you moved; the line makes a planet louder, it doesn't change its nature.
Check the birth time. Every line moves about 28 km west for each minute later you were born, so a time rounded to the quarter hour can shift a line by up to 200 km at the equator. The cheapest test of all is a visit: spend a couple of weeks on a line before you sign a lease.
Every planet line
The globe also draws Chiron, the lunar nodes, Lilith and the main asteroids, read the same way; Pro shows all 21.