MySQL Manual
11 Spatial Extensions in MySQL
- 11.2 The OpenGIS Geometry Model
- 11.2.1 The Geometry Class Hierarchy
- 11.2.2 Class
Geometry - 11.2.4 Class
Point - 11.2.7 Class
Curve - 11.2.9 Class
LineString - 11.2.12 Class
Surface - 11.2.14 Class
Polygon - 11.2.17 Class
GeometryCollection - 11.2.18 Class
MultiPoint - 11.2.21 Class
MultiCurve - 11.2.23 Class
MultiLineString - 11.2.25 Class
MultiSurface - 11.2.27 Class
MultiPolygon
11.2.18 Class MultiPoint
A MultiPoint is a geometry collection composed of
Point elements. The points are not connected or ordered
in any way.
11.2.19 MultiPoint Examples
-
On a world map, a
Multipointcould represent a chain of small islands. -
On a city map, a
Multipointcould represent the outlets for a ticket office.
11.2.20 MultiPoint Properties
-
MultiPointis defined as a zero-dimensional geometry. -
A
MultiPointis simple if no two of itsPointvalues are equal (have identical coordinate values). -
The boundary of a
MultiPointis the empty set.
