Placidus is the site's default chart method. You need the following in order to get a complete, accurate birth chart: Your full date of birth. Your place of birth (the closest major city can work, too). Your time of birth.

What is the most accurate house system in astrology?

Proponents of the equal house system claim that it is more accurate and less distorting in higher latitudes (especially above 60 degrees) than the Placidean and other quadrant house systems.

What is Placidus based on?

It turns out, the origins of the Placidus house system and its popularization lie in the 17th century, and it was partially based on an an attempt to reinterpret a controversial passage from the work of the 2nd century astrologer Claudius Ptolemy.