MULTIPOLYGON
Syntax
MultiPolygon(poly1,poly2,...)
Description
Constructs a WKB MultiPolygon value from a set of WKB Polygon arguments. If any argument is not a WKB Polygon, the return value is NULL
.
Example
CREATE TABLE gis_multi_polygon (g MULTIPOLYGON); INSERT INTO gis_multi_polygon VALUES (MultiPolygonFromText('MULTIPOLYGON(((28 26,28 0,84 0,84 42,28 26),(52 18,66 23,73 9,48 6,52 18)), ((59 18,67 18,67 13,59 13,59 18)))')), (MPolyFromText('MULTIPOLYGON(((28 26,28 0,84 0,84 42,28 26),(52 18,66 23,73 9,48 6,52 18)), ((59 18,67 18,67 13,59 13,59 18)))')), (MPolyFromWKB(AsWKB(MultiPolygon(Polygon(LineString( Point(0, 3), Point(3, 3), Point(3, 0), Point(0, 3)))))));
MultiPolygon_Example:
CREATE TABLE multipolygon_example ( m MULTIPOLYGON );
INSERT INTO multipolygon_example VALUES (ST_MultiPolygonFromText( 'MULTIPOLYGON(((0 40, 0 20, 6 30, 12 20, 12 40, 0 40), (15 40, 15 20, 25 20, 30 25, 30 35, 25 40, 15 40)))')), (ST_MPolyFromText( 'MULTIPOLYGON(((-5 45, 35 45, 35 15, -5 15, -5 45), (0 40, 0 20, 6 30, 12 20, 12 40, 0 40), (15 40, 15 20, 25 20, 30 25, 30 35, 25 40, 15 40)))')), (MultiPolygon(Polygon(LineString(Point(0, 0), Point(0, 1), Point(1, 1), Point(1, 0), Point(0, 0)))));
SELECT ST_AsWKT(m) FROM multipolygon_example;
+-------------------------------------------------------------------------------------------------------------------------------+ | ST_AsWKT(m) | +-------------------------------------------------------------------------------------------------------------------------------+ | MULTIPOLYGON(((0 40,0 20,6 30,12 20,12 40,0 40),(15 40,15 20,25 20,30 25,30 35,25 40,15 40))) | | MULTIPOLYGON(((-5 45,35 45,35 15,-5 15,-5 45),(0 40,0 20,6 30,12 20,12 40,0 40),(15 40,15 20,25 20,30 25,30 35,25 40,15 40))) | | MULTIPOLYGON(((0 0,0 1,1 1,1 0,0 0))) | +-------------------------------------------------------------------------------------------------------------------------------+
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