MySQL provides functions to perform various operations on spatial data. MySQL提供了对空间数据执行各种操作的函数。These functions can be grouped into several major categories according to the type of operation they perform:这些功能可根据其执行的操作类型分为几大类：
Functions that create geometries in various formats (WKT, WKB, internal)创建各种格式几何图形的函数（WKT、WKB、internal)
Functions that convert geometries between formats在格式之间转换几何图形的函数
Functions that access qualitative or quantitative properties of a geometry访问几何体的定性或定量属性的函数
Functions that describe relations between two geometries描述两个几何体之间关系的函数
Functions that create new geometries from existing ones从现有几何图形创建新几何图形的函数
For general background about MySQL support for using spatial data, see Section 11.4, “Spatial Data Types”.有关MySQL支持使用空间数据的一般背景信息，请参阅第11.4节，“空间数据类型”。