Home Check sets polarity by the exact degree, finds the centre from the true shape of the plan, then lays the 24 mountains and the bagua over the drawing to check every position.
Glossary · Compass & qi theory
Set polarity立极
Explanation
It involves two steps: locating the centre (the pole) of the plan, and rotating the 24-mountain and bagua rings to match the real orientation of the house. For a rectangle, the centre is usually where the diagonals cross; for L-shaped or many-sided homes, it has to be computed from the actual shape.
An error of a few degrees can push the main door or the kitchen into the next mountain, so every feng shui check on a plan starts here.
How Home Check uses it
Questions
On a multi-storey house, which floor sets the polarity?
Usually the ground floor; the upper floors belong to the same house and share its orientation. In Home Check, if a floor differs from the ground floor, the app asks you to confirm before setting polarity.
How is setting polarity different from measuring direction?
Measuring gives you one degree. Setting polarity places that degree on the plan, around the true centre, so you know which sector each room is in.
Do this for your own home in the app
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Markdown version of this page Index for machine readers (llms.txt)