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SRID

Sintassi

SRID(g)

Spiegazione

Restituisce un numero intero che indica lo Spatial Reference System ID (ID del sistema di referenze spaziali) del valore geometrico g.

In MariaDB, il valore SRID è semplicemente un intero associato al valore geometrico. Tutti i calcoli vengono effettuati in base dalla geometria euclidea.

Esempi

MariaDB [(none)]> SELECT SRID(GeomFromText('LineString(1 1,2 2)',101));
+-----------------------------------------------+
| SRID(GeomFromText('LineString(1 1,2 2)',101)) |
+-----------------------------------------------+
|                                           101 |
+-----------------------------------------------+
1 row in set (0.01 sec)
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