Rechercher dans le manuel MySQL
11.5.2.8 GeometryCollection Class
A GeomCollection
is a geometry that is a
collection of zero or more geometries of any class.
GeomCollection
and
GeometryCollection
are synonymous, with
GeomCollection
the preferred type name.
All the elements in a geometry collection 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
geometry collection, although the subclasses of
GeomCollection
described in the following
sections may restrict membership. Restrictions may be based
on:
Element type (for example, a
MultiPoint
may contain onlyPoint
elements)Dimension
Constraints on the degree of spatial overlap between elements
Document created the 26/06/2006, last modified the 26/10/2018
Source of the printed document:https://www.gaudry.be/en/mysql-rf-gis-class-geometrycollection.html
The infobrol is a personal site whose content is my sole responsibility. The text is available under CreativeCommons license (BY-NC-SA). More info on the terms of use and the author.
References
These references and links indicate documents consulted during the writing of this page, or which may provide additional information, but the authors of these sources can not be held responsible for the content of this page.
The author This site is solely responsible for the way in which the various concepts, and the freedoms that are taken with the reference works, are presented here. Remember that you must cross multiple source information to reduce the risk of errors.