Rechercher dans le manuel MySQL

11.5.2.4 Curve Class

A Curve is a one-dimensional geometry, usually represented by a sequence of points. Particular subclasses of Curve define the type of interpolation between points. Curve is a noninstantiable class.

Curve Properties

  • A Curve has the coordinates of its points.

  • A Curve is defined as a one-dimensional geometry.

  • A Curve is simple if it does not pass through the same point twice, with the exception that a curve can still be simple if the start and end points are the same.

  • A Curve is closed if its start point is equal to its endpoint.

  • The boundary of a closed Curve is empty.

  • The boundary of a nonclosed Curve consists of its two endpoints.

  • A Curve that is simple and closed is a LinearRing.


Find a PHP function

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-curve.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

  1. View the html document Language of the document:en Manuel MySQL : https://dev.mysql.com/

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.

Contents Haut