Meridia

What is astrocartography?

A friendly guide, about a 5 minute read

1. The big idea
2. The four lines
3. What each planet brings
4. How close is close enough?
5. Why your birth time matters
6. How to use your map
7. Where it comes from
8. An honest note

The big idea

Your birth chart is a snapshot of the sky from the place you were born. But at that same moment, the sky looked different from everywhere else on Earth. In Tokyo the Moon might have been rising; in Lisbon, Venus might have been right overhead.

Astrocartography asks: where on Earth was each planet in one of its most powerful positions? Those places form lines that sweep across the globe. Astrologers say that near a planet's line, its themes come forward in your life, a little like turning up one instrument in a song.

The four lines

Every planet draws four lines, one for each of the chart's four "angles." They're the most personal points of a birth chart, which is why they matter so much.

On Meridia's globe, MC and IC lines are solid and run straight from pole to pole. AC and DC lines are dotted and curve, because rising and setting depend on latitude.

What each planet brings

Put the two together to read a line: Venus on the DC is a classic place for romance; Jupiter on the MC is a lucky spot for your career; Moon on the IC can feel deeply like home.

Every chart is different, too. How well a planet is placed in your birth chart shapes how its lines feel, which is why Meridia looks at your whole chart, not just the lines.

How close is close enough?

A line isn't a wall you cross. Its influence is strongest within roughly 250 km (about 150 miles) and gently fades out to around 1,000 km. Meridia shows this as a soft glow around a line when you tap it, and tells you how far a place is from each nearby line.

Where two lines cross, their themes blend. Those crossings can be some of the most interesting places on your map.

Why your birth time matters

The Earth turns about one degree every four minutes, so four minutes of birth time moves a line about 100 km. An hour off can move it over 1,000 km. The long-form birth certificate, a parent, or the hospital where you were born can often tell you the exact time.

If you only know roughly when you were born, Meridia shows your lines as soft bands covering everywhere they could be, so you still get a useful picture.

How to use your map

• Start with a goal. Love, career, rest, adventure? In Meridia, "Where should I go?" finds your best lines for it.
• Check places you already know. Look up cities you've loved (or not) and see which lines run nearby. It's often surprisingly illuminating.
• Visiting vs. living. A trip lets you enjoy a line's highlights; living somewhere means its themes become part of everyday life.
• Compare with someone. Add a partner or friend to see where your lines meet.

Where it comes from

Mapping planets onto places is an old idea in astrology, but the modern method was popularized in the 1970s by the astrologer Jim Lewis, who drew the planetary lines onto world maps. Today it's often called relocation astrology or astro-mapping.

An honest note

Astrocartography isn't science, and no map can decide where you'll be happy. We think of it as a beautiful prompt for reflection: a way to notice what you're looking for, and to dream a little about where you might find it.

© 2026 Cayla Murdoch