How a birth chart becomes
a location comparison
We calculate planetary positions, project their angular lines around the globe, recast the houses for each location, and translate the result into a comparison for reflection and planning.
Astronomy Engine
Every reading is calculated from the birth details supplied by the user. Astro.lat then applies its own astrological rules to compare the current location and cities around the world.
Why exact birth details matter
Astrocartography depends on time and place, not only a Sun sign. A different birth time can change the angles and relocated houses, so the quality of the result depends on the quality of the input.
- Planetary longitude calculation
- Four angular line families
- Relocated houses for compared cities
The Cardinal Vectors
Your natal planets are projected onto the globe along four distinct angles (The Angles). Each angle dictates how the energy manifests in your life.
Midheaven
Career, Reputation, Public Image
Imum Coeli
Home, Roots, Inner Security
Ascendant
Self-Image, Physical Vitality
Descendant
Partnership, Marriage, Others
The Orb of Influence
Astro.lat does not treat a line as simply on or off. It uses the distance to an angular line, relocated-house placement, and the surrounding chart to produce a comparative score.
The Zenit Point
The line is most exact here, so its astrological theme receives the strongest emphasis in the comparison.
The 250km Radius
The surrounding region may still carry the theme with less intensity. A trial visit and practical constraints matter more than a score alone.