## Name

ST_Summary — Returns a text summary of the contents of a geometry.

## Synopsis

`text ST_Summary(`geometry g`)`;

`text ST_Summary(`geography g`)`;

## Descrizione

Restituisce il tipo di geometria per il valore ST_Geometry.

Flags shown square brackets after the geometry type have the following meaning:

• M: has M coordinate

• Z: has Z coordinate

• B: has a cached bounding box

• G: is geodetic (geography)

• S: has spatial reference system Questo metodo supporta le Curve e le Circular String. Questa funzione supporta le Polyhedral Surface. Questa funzione supporta i Triangoli e le Triangulated Irregular Network Surfaces (TIN).

Availability: 1.2.2

Enhanced: 2.0.0 added support for geography

Enhanced: 2.1.0 S flag to denote if has a known spatial reference system

Enhanced: 2.2.0 Added support for TIN and Curves

## Esempi

```=# SELECT ST_Summary(ST_GeomFromText('LINESTRING(0 0, 1 1)')) as geom,
ST_Summary(ST_GeogFromText('POLYGON((0 0, 1 1, 1 2, 1 1, 0 0))')) geog;
geom             |          geog
-----------------------------+--------------------------
LineString[B] with 2 points | Polygon[BGS] with 1 rings
| ring 0 has 5 points
:
(1 row)

=# SELECT ST_Summary(ST_GeogFromText('LINESTRING(0 0 1, 1 1 1)')) As geog_line,
ST_Summary(ST_GeomFromText('SRID=4326;POLYGON((0 0 1, 1 1 2, 1 2 3, 1 1 1, 0 0 1))')) As geom_poly;
;
geog_line             |        geom_poly
-------------------------------- +--------------------------
LineString[ZBGS] with 2 points | Polygon[ZBS] with 1 rings
:    ring 0 has 5 points
:
(1 row)

```