Disjoint (spatial predicate)

True when two geometries share no points at all (no intersection).

Category: Topology · Also known as: ST_Disjoint, disjoint predicate

Definition (expanded)

Disjoint is the opposite of Intersects. If two polygons are disjoint, they neither touch nor overlap. This is useful for quick sanity checks (e.g., AOI must not intersect restricted zones).

Examples

PostGIS disjoint

SQL

SELECT ST_Disjoint(a.geom, b.geom) FROM a, b;

Related terms

Intersects (spatial predicate)True when two geometries share any point in common (touching or overlapping).Touches (spatial predicate)True when two geometries touch at the boundary but do not overlap in area (or interior).Overlaps (spatial predicate)True when two geometries overlap partially (they share some interior area) but neither fully contains the other.