ST_Intersects — Returns TRUE if the Geometries/Geography "spatially intersect in 2D" - (share any portion of space) and FALSE if they don't (they are Disjoint). For geography tolerance is 0.00001 meters (so any points that close are considered to intersect)
If a geometry or geography shares any portion of space then they intersect. For geography -- tolerance is 0.00001 meters (so any points that are close are considered to intersect)
ST_Overlaps, ST_Touches, ST_Within all imply spatial intersection. If any of the aforementioned returns true, then the geometries also spatially intersect. Disjoint implies false for spatial intersection.
Changed: 3.0.0 SFCGAL version removed.
Enhanced: 2.5.0 Supports GEOMETRYCOLLECTION.
Enhanced: 2.3.0 Enhancement to PIP short-circuit extended to support MultiPoints with few points. Prior versions only supported point in polygon.
Performed by the GEOS module (for geometry), geography is native
Availability: 1.5 support for geography was introduced.
This function call will automatically include a bounding box comparison that will make use of any indexes that are available on the geometries.
For geography, this function has a distance tolerance of about 0.00001 meters and uses the sphere rather than spheroid calculation.
NOTE: this is the "allowable" version that returns a boolean, not an integer.
This method implements the OpenGIS Simple Features Implementation Specification for SQL 1.1. s220.127.116.11 //s18.104.22.168 - ST_Intersects(g1, g2 ) --> Not (ST_Disjoint(g1, g2 ))
This method implements the SQL/MM specification. SQL-MM 3: 5.1.27
This method is also provided by SFCGAL backend.
SELECT ST_Intersects('POINT(0 0)'::geometry, 'LINESTRING ( 2 0, 0 2 )'::geometry); st_intersects --------------- f (1 row) SELECT ST_Intersects('POINT(0 0)'::geometry, 'LINESTRING ( 0 0, 0 2 )'::geometry); st_intersects --------------- t (1 row)
SELECT ST_Intersects( 'SRID=4326;LINESTRING(-43.23456 72.4567,-43.23456 72.4568)'::geography, 'SRID=4326;POINT(-43.23456 72.4567772)'::geography ); st_intersects --------------- t