Whole sign houses
Whole sign houses make each house exactly one sign, with the sign holding the Ascendant becoming the entire first house, which is the oldest and simplest of the house systems.
Because the houses and the signs coincide, a planet is always in the same house as the sign it occupies, and the Midheaven is free to fall in the ninth, tenth or eleventh rather than always marking the tenth cusp. Hellenistic astrology used it throughout.
Our written interpretations use Placidus rather than whole sign, consistently, so a reading never mixes two systems. The comparison tool shows what the same chart looks like in either.
Frequently asked
Does whole sign work at high latitudes?
Yes, and that is one of its advantages: it never produces the distorted or impossible houses that time-based systems can give near the poles.
Which house system do your readings use?
Placidus, everywhere, so that no interpretation is assembled from two different divisions of the same sky.