Same chart, a different emphasis in every city.

The sky at your birth moment is a single sky — but from every point on Earth it stands at a different angle. The planet rising over your birthplace was, at that same instant, culminating over a city to your east, and sitting below the horizon to your west and sitting below the horizon on the far side of the world. Astrocartography turns that plain fact into a map: for each planet it computes the places where it would have been exactly rising (ASC), setting (DSC), culminating (MC) or anti-culminating (IC) at your birth moment — and those places trace lines across the world.

MC and IC lines run straight north–south like meridians; ASC and DSC lines curve across the map. A line's influence is not a hard border: the classical rule of thumb is a band of a few hundred kilometres, fading with distance. Cities that sit between two lines read as a blend, some of each. And most of the map is quiet, which is not a flaw — most places do not foreground any planet in particular.

Because all of this is derived from the angles of your birth moment, the map is only as accurate as the birth time behind it. An error of a few minutes can shift a line by roughly a hundred kilometres — the difference between "my Venus line runs through Rome" and "through Florence". Before reading your lines, make sure your natal chart, and especially your Ascendant, is computed correctly.

A Sun MC line means visibility: you get noticed there, career efforts pick up momentum, stages find you. A Venus ASC line brings ease and attraction — people warm to you, your eye for aesthetics sharpens, social life flows with less effort. Both sound pleasant; but for someone worn out by visibility, a Sun MC line is not a gift, it is a load. Lines are not good or bad — what matters is what you want from the place.

Jupiter lines are growth lines. Tradition calls it luck; the more honest word is openness — doors open more easily there because you behave more expansively. Saturn lines bring discipline and structure: excellent for founding a company, finishing a long training, building something serious — and heavy for resting, lightening up, or letting things drift.

Mars lines mean drive and friction: you get things done, and you also find things to argue about. Moon lines carry emotional intensity — a place either feels like home from the first day or floods you, and both are faces of the same line. Every one of these readings comes from the classical tradition, and each describes a leaning, not a guarantee.

Start with what does not change: your natal chart. Moving does not recompute it — your birth moment is fixed, and your planets' signs, their stories in the houses, the aspects between them all travel with you. What changes when you relocate is the angling: the same chart is re-angled to a new horizon. This is why moving to a Venus line does not fix a natal Venus problem; you live the same pattern closer to the foreground, that is all.

Second: lines describe emphasis, not fate. Some people live quiet lives on Saturn lines; some waste every opening on Jupiter lines. A line tilts the floor — you still do the walking. A relocation reading is therefore a decision input, not a verdict: it belongs on the table next to the job, the language, the family and the cost of living, not above them.

Baby Astro does this reading for you: name the cities you are considering, and it tells you which planet lines run near each one and what the classical tradition says they foreground. One more input for a move, a long trip, or a remote-work decision.