ExteriorRing
Stai visualizzando una vecchia versione di questo article. Visualizza
la versione più recente.
Sintassi
ExteriorRing(poligono)
Spiegazione
Restituisce l'anello esterno del poligono come LineString.
Examples:
MariaDB [(none)]> SET @poly =
-> 'Polygon((0 0,0 3,3 3,3 0,0 0),(1 1,1 2,2 2,2 1,1 1))';
MariaDB [(none)]> SELECT AsText(ExteriorRing(GeomFromText(@poly)));
+-------------------------------------------+
| AsText(ExteriorRing(GeomFromText(@poly))) |
+-------------------------------------------+
| LINESTRING(0 0,0 3,3 3,3 0,0 0) |
+-------------------------------------------+
1 row in set (0.00 sec)
Commenti
Sto caricando i commenti......
Content reproduced on this site is the property of its respective owners,
and this content is not reviewed in advance by MariaDB. The views, information and opinions
expressed by this content do not necessarily represent those of MariaDB or any other party.
