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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