- Catégories :
ST_WITHIN¶
Returns true if the the first geospatial object is fully contained by the second geospatial object. In other words:
The first GEOGRAPHY object
g1
is fully contained by the second GEOGRAPHY objectg2
.The first GEOMETRY object
g1
is fully contained by the second GEOMETRY objectg2
.
Calling ST_WITHIN(g1, g2)
is equivalent to calling ST_CONTAINS(g2, g1)
.
Although ST_COVEREDBY and ST_WITHIN might seem similar, the two functions have subtle differences. For details on the differences between « covered by » and « within », see the Dimensionally Extended 9-Intersection Model (DE-9IM).
Note
Cette fonction ne prend pas en charge l’utilisation de GeometryCollection ou de FeatureCollection comme valeurs d’entrée.
- Voir aussi :
Syntaxe¶
ST_WITHIN( <geography_expression_1> , <geography_expression_2> )
ST_WITHIN( <geometry_expression_1> , <geometry_expression_2> )
Arguments¶
geography_expression_1
Un objet GEOGRAPHY qui n’est pas un GeometryCollection ou un FeatureCollection.
geography_expression_2
Un objet GEOGRAPHY qui n’est pas un GeometryCollection ou un FeatureCollection.
geometry_expression_1
A GEOMETRY object that is not a GeometryCollection or FeatureCollection.
geometry_expression_2
A GEOMETRY object that is not a GeometryCollection or FeatureCollection.
Renvoie¶
BOOLEAN.
Exemples¶
GEOGRAPHY Examples¶
Cela montre une utilisation simple de la fonction ST_WITHIN :
create table geospatial_table_01 (g1 GEOGRAPHY, g2 GEOGRAPHY); insert into geospatial_table_01 (g1, g2) values ('POLYGON((0 0, 3 0, 3 3, 0 3, 0 0))', 'POLYGON((1 1, 2 1, 2 2, 1 2, 1 1))');SELECT ST_WITHIN(g1, g2) FROM geospatial_table_01; +-------------------+ | ST_WITHIN(G1, G2) | |-------------------| | False | +-------------------+