PostGIS
Description
Returns true if two geometries are disjoint. Geometries are disjoint
if they have no point in common.
If any other spatial relationship is true for a pair of geometries, they are not disjoint. Disjoint implies that ST_Intersects is false.
In mathematical terms: [.emphasis]#ST_Disjoint(A, B) ⇔ A ⋂ B = ∅ #
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Performed by the GEOS module
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[.inlinemediaobject]
This method implements the
OGC Simple Features
Implementation Specification for SQL 1.1.
s2.1.1.2 //s2.1.13.3 - a.Relate(b, 'FF*FF**')
This
method implements the SQL/MM specification.
SQL-MM 3: 5.1.26
Examples
SELECT ST_Disjoint('POINT(0 0)'::geometry, 'LINESTRING ( 2 0, 0 2 )'::geometry);
st_disjoint
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t
(1 row)
SELECT ST_Disjoint('POINT(0 0)'::geometry, 'LINESTRING ( 0 0, 0 2 )'::geometry);
st_disjoint
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f
(1 row)