ST_Intersects — Tests if two geometries intersect (they have at least one point in common).
Compares two geometries and returns
true if they intersect.
Geometries intersect if they have any point in common.
For geography, a distance tolerance of 0.00001 meters is used (so points that are very close are considered to intersect).
Geometries intersect if their DE-9IM Intersection Matrix matches one of:
Spatial intersection is implied by all the other spatial relationship tests, except ST_Disjoint, which tests that geometries do NOT intersect.
This function automatically includes a bounding box comparison that makes use of any spatial indexes that are available on the geometries.
Changed: 3.0.0 SFCGAL version removed and native support for 2D TINS added.
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.
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 OGC Simple Features Implementation Specification for SQL 1.1. s18.104.22.168 //s22.214.171.124 - ST_Intersects(g1, g2 ) --> Not (ST_Disjoint(g1, g2 ))
This method implements the SQL/MM specification. SQL-MM 3: 5.1.27
This method supports Circular Strings and Curves
This function supports Triangles and Triangulated Irregular Network Surfaces (TIN).
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) -- Look up in table. Make sure table has a GiST index on geometry column for faster lookup. SELECT id, name FROM cities WHERE ST_Intersects(geom, 'SRID=4326;POLYGON((28 53,27.707 52.293,27 52,26.293 52.293,26 53,26.293 53.707,27 54,27.707 53.707,28 53))'); id | name ----+------- 2 | Minsk (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