(mysql.info) geometry-property-functions

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(mysql.info) functions-to-convert-geometries-between-formats

(mysql.info) analysing-spatial-information

(mysql.info) functions-that-create-new-geometries-from-existing-ones

 
 16.5.2 `Geometry' Functions
 ---------------------------
 

Menu

 
* general-geometry-property-functions  General Geometry Functions
* point-property-functions     `Point' Functions
* linestring-property-functions  `LineString' Functions
* multilinestring-property-functions  `MultiLineString' Functions
* polygon-property-functions   `Polygon' Functions
* multipolygon-property-functions  `MultiPolygon' Functions
* geometrycollection-property-functions  `GeometryCollection' Functions
 
 Each function that belongs to this group takes a geometry value as its
 argument and returns some quantitative or qualitative property of the
 geometry. Some functions restrict their argument type. Such functions
 return `NULL' if the argument is of an incorrect geometry type. For
 example, `Area()' returns `NULL' if the object type is neither
 `Polygon' nor `MultiPolygon'.
 

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(mysql.info) functions-to-convert-geometries-between-formats

(mysql.info) analysing-spatial-information

(mysql.info) functions-that-create-new-geometries-from-existing-ones