ENVELOPE
Sintassi
Envelope(g)
Spiegazione
Restituisce il Minimum Bounding Rectangle (MBR, rettangolo limite minimo) per il valore geometrico g. Il risultato restituito è di tipo Polygon.
Il poligono è definito dagli angoli del rettangolo che racchiude la figura:
POLYGON((MINX MINY, MAXX MINY, MAXX MAXY, MINX MAXY, MINX MINY))
Esempi
MariaDB [(none)]> SELECT AsText(Envelope(GeomFromText('LineString(1 1,2 2)')));
+-------------------------------------------------------+
| AsText(Envelope(GeomFromText('LineString(1 1,2 2)'))) |
+-------------------------------------------------------+
| POLYGON((1 1,2 1,2 2,1 2,1 1)) |
+-------------------------------------------------------+
1 row in set (0.00 sec)
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