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18.2.8. Class GeometryCollection

A GeometryCollection is a geometry that is a collection of one or more geometries of any class.

All the elements in a GeometryCollection must be in the same Spatial Reference System (that is, in the same coordinate system). There are no other constraints on the elements of a GeometryCollection, although the subclasses of GeometryCollection described in the following sections may restrict membership. Restrictions may be based on:

  • Element type (for example, a MultiPoint may contain only Point elements)

  • Dimension

  • Constraints on the degree of spatial overlap between elements


 
 
  Published under the terms of the GNU General Public License Design by Interspire