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Predicate

ST_Contains

Introduction: Return true if A fully contains B

Format: ST_Contains (A: Geometry, B: Geometry)

Since: v1.2.0

Example:

SELECT ST_Contains(ST_GeomFromWKT('POLYGON((175 150,20 40,50 60,125 100,175 150))'), ST_GeomFromWKT('POINT(174 149)'))

Output:

false

ST_Crosses

Introduction: Return true if A crosses B

Format: ST_Crosses (A: Geometry, B: Geometry)

Since: v1.5.0

Example:

SELECT ST_Crosses(ST_GeomFromWKT('POLYGON((1 1, 4 1, 4 4, 1 4, 1 1))'),ST_GeomFromWKT('POLYGON((2 2, 5 2, 5 5, 2 5, 2 2))'))

Output:

false

ST_Disjoint

Introduction: Return true if A and B are disjoint

Format: ST_Disjoint (A: Geometry, B: Geometry)

Since: v1.2.1

Example:

SELECT ST_Disjoint(ST_GeomFromWKT('POLYGON((1 4, 4.5 4, 4.5 2, 1 2, 1 4))'),ST_GeomFromWKT('POLYGON((5 4, 6 4, 6 2, 5 2, 5 4))'))

Output:

true

ST_DWithin

Introduction: Returns true if 'leftGeometry' and 'rightGeometry' are within a specified 'distance'. This function essentially checks if the shortest distance between the envelope of the two geometries is <= the provided distance.

Format: ST_DWithin (leftGeometry: Geometry, rightGeometry: Geometry, distance: Double)

Since: v1.5.1

Example:

SELECT ST_DWithin(ST_GeomFromWKT('POINT (0 0)'), ST_GeomFromWKT('POINT (1 0)'), 2.5)

Output:

true

ST_Equals

Introduction: Return true if A equals to B

Format: ST_Equals (A: Geometry, B: Geometry)

Since: v1.5.0

Example:

SELECT ST_Equals(ST_GeomFromWKT('LINESTRING(0 0,10 10)'), ST_GeomFromWKT('LINESTRING(0 0,5 5,10 10)'))

Output:

true

ST_Intersects

Introduction: Return true if A intersects B

Format: ST_Intersects (A: Geometry, B: Geometry)

Since: v1.2.0

Example:

SELECT ST_Intersects(ST_GeomFromWKT('LINESTRING(-43.23456 72.4567,-43.23456 72.4568)'), ST_GeomFromWKT('POINT(-43.23456 72.4567772)'))

Output:

true

ST_Overlaps

Introduction: Return true if A overlaps B

Format: ST_Overlaps (A: Geometry, B: Geometry)

Since: v1.5.0

Example:

SELECT ST_Overlaps(ST_GeomFromWKT('POLYGON((2.5 2.5, 2.5 4.5, 4.5 4.5, 4.5 2.5, 2.5 2.5))'), ST_GeomFromWKT('POLYGON((4 4, 4 6, 6 6, 6 4, 4 4))'))

Output:

true

ST_Touches

Introduction: Return true if A touches B

Format: ST_Touches (A: Geometry, B: Geometry)

Since: v1.5.0

Example:

SELECT ST_Touches(ST_GeomFromWKT('LINESTRING(0 0,1 1,0 2)'), ST_GeomFromWKT('POINT(0 2)'))

Output:

true

ST_Within

Introduction: Return true if A is within B

Format: ST_Within (A: Geometry, B: Geometry)

Since: v1.3.0

Example:

SELECT ST_Within(ST_GeomFromWKT('POLYGON((0 0,3 0,3 3,0 3,0 0))'), ST_GeomFromWKT('POLYGON((1 1,2 1,2 2,1 2,1 1))'))

Output:

false

ST_OrderingEquals

Introduction: Returns true if the geometries are equal and the coordinates are in the same order

Format: ST_OrderingEquals(A: geometry, B: geometry)

Since: v1.2.1

Example 1:

SELECT ST_OrderingEquals(ST_GeomFromWKT('POLYGON((2 0, 0 2, -2 0, 2 0))'), ST_GeomFromWKT('POLYGON((2 0, 0 2, -2 0, 2 0))'))

Output:

true

Example 2:

SELECT ST_OrderingEquals(ST_GeomFromWKT('POLYGON((2 0, 0 2, -2 0, 2 0))'), ST_GeomFromWKT('POLYGON((0 2, -2 0, 2 0, 0 2))'))

Output:

false

ST_Covers

Introduction: Return true if A covers B

Format: ST_Covers (A: Geometry, B: Geometry)

Since: v1.3.0

Example:

SELECT ST_Covers(ST_GeomFromWKT('POLYGON((-2 0,0 2,2 0,-2 0))'), ST_GeomFromWKT('POLYGON((-1 0,0 1,1 0,-1 0))'))

Output:

true

ST_CoveredBy

Introduction: Return true if A is covered by B

Format: ST_CoveredBy (A: Geometry, B: Geometry)

Since: v1.3.0

Example:

SELECT ST_CoveredBy(ST_GeomFromWKT('POLYGON((0 0,3 0,3 3,0 3,0 0))'),  ST_GeomFromWKT('POLYGON((1 1,2 1,2 2,1 2,1 1))'))

Output:

false

Last update: January 10, 2024 19:16:11