ST_Polygon

ST_Polygon
Anterior	7.3. Contructores Geométricos	Siguiente

Nombre

ST_Polygon — Creates a Polygon from a LineString with a specified SRID.

Sinopsis

geometry ST_Polygon(geometry lineString, integer srid);

Descripción

Returns a polygon built from the given LineString and sets the spatial reference system from the srid.

ST_Polygon is similar to ST_MakePolygon Variant 1 with the addition of setting the SRID.


	Esta función no acepta una MULTILINESTRING. Utiliza ST_LineMerge o ST_Dump para generar una linestring.

This method implements the OGC Simple Features Implementation Specification for SQL 1.1.

This method implements the SQL/MM specification. SQL-MM 3: 8.3.2

This function supports 3d and will not drop the z-index.

Ejemplos

Create a 2D polygon.

Code

SELECT ST_Polygon('LINESTRING(75 29,77 29,77 31,75 31,75 29)'::geometry, 4326);

Output

POLYGON((75 29,77 29,77 31,75 31,75 29))

0103000020E610000001000000050000000000000000C052400000000000003D4000000000004053400000000000003D4000000000004053400000000000003F400000000000C052400000000000003F400000000000C052400000000000003D40

Figure

Create a 3D polygon.

Code

SELECT ST_Polygon('LINESTRING(75 29 1,77 29 2,77 31 2,75 31 1,75 29 1)'::geometry, 4326);

Output

SRID=4326;POLYGON((75 29 1,77 29 2,77 31 2,75 31 1,75 29 1))

01030000A0E610000001000000050000000000000000C052400000000000003D40000000000000F03F00000000004053400000000000003D40000000000000004000000000004053400000000000003F4000000000000000400000000000C052400000000000003F40000000000000F03F0000000000C052400000000000003D40000000000000F03F

Figure

Ver también

ST_AsEWKT, ST_AsText, ST_GeomFromEWKT, ST_GeomFromText, ST_LineMerge, ST_MakePolygon

Anterior	Subir	Siguiente
ST_PointZM	Inicio	ST_TileEnvelope