The Ultimate Guide to High Availability with MariaDB

Area

Sintassi

Area(poligono)

Spiegazione

Restituisce un numero a doppia precisione che rappresenta l'area del poligono, misurata nel suo sistema spaziale di riferimento.

Esempi

MariaDB [(none)]> SET @poly = 'Polygon((0 0,0 3,3 0,0 0),(1 1,1 2,2 1,1 1))';
MariaDB [(none)]> SELECT Area(GeomFromText(@poly));
+---------------------------+
| Area(GeomFromText(@poly)) |
+---------------------------+
|                         4 |
+---------------------------+
1 row in set (0.00 sec)

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