https://dev.mysql.com/gis-polygon-property-functions.html
Functions in this section return properties of Polygon or MultiPolygon values. These functions are available for obtaining polygon properties: ST_Area({poly|mpoly}) Returns a double-precision number indicating the area of the Polygon or ...Unless ...
https://dev.mysql.com/gis-class-polygon.html
A Polygon is a planar Surface representing a multisided geometry. It is defined by a single exterior boundary and zero or more interior boundaries, where each interior boundary defines a hole in the Polygon. Polygon Examples On a region map, ...
https://dev.mysql.com/func-op-summary-ref.html
GTID_SUBTRACT() Return all GTIDs in set that are not in subset. JSON_CONTAINS() Whether JSON document contains specific object at path JSON_CONTAINS_PATH() Whether JSON document contains any data at path JSON_DEPTH() Maximum depth of JSON document ...
https://dev.mysql.com/spatial-function-reference.html
The following table lists each spatial function and provides a short description of each one.
https://dev.mysql.com/gis-class-multipolygon.html
A MultiPolygon is a MultiSurface object composed of Polygon elements. MultiPolygon Examples On a region map, a MultiPolygon could represent a system of lakes. MultiPolygon Assertions A MultiPolygon has no two Polygon elements with interiors that ...
https://dev.mysql.com/spatial-operator-functions.html
If the distance is 0, ST_Buffer() returns the geometry argument unchanged: mysql> SET @pt = ST_GeomFromText('POINT(0 0)'); mysql> SELECT ST_AsText(ST_Buffer(@pt, 0)); +------------------------------+ | ST_AsText(ST_Buffer(@pt, 0)) | ... OpenGIS ...
https://dev.mysql.com/geometry-well-formedness-validity.html
For geometry values, MySQL distinguishes between the concepts of syntactically well-formed and geometrically valid. Spatial import functions that parse WKT or WKB values raise an error for attempts to create a geometry that is not syntactically ...
https://dev.mysql.com/gis-data-formats.html
MySQL uses values from 1 through 7 to indicate Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, and GeometryCollection. MySQL supports geometry types of Point, LineString, Polygon, MultiPoint, MultiLineString, MultiPolygon, and ... Two standard spatial data formats are used to represent geometry objects in queries: Well-Known Text (WKT) format Well-Known Binary (WKB) format Internally, MySQL stores geometry values in a format that is not identical to either WKT or WKB ...
https://dev.mysql.com/spatial-convenience-functions.html
Otherwise, the result is a polygon using pt1 and pt2 as diagonal points. mysql> SET @pt1 = ST_GeomFromText('POINT(0 0)'); mysql> SET @pt2 = ST_GeomFromText('POINT(1 1)'); mysql> SELECT ST_AsText(ST_MakeEnvelope(@pt1, @pt2)); ... The functions in ...
https://dev.mysql.com/spatial-relation-functions-mbr.html
mysql> SET @g1 = ST_GeomFromText('Polygon((0 0,0 3,3 3,3 0,0 0))'); mysql> SET @g2 = ST_GeomFromText('Polygon((0 0,0 5,5 5,5 0,0 0))'); mysql> SELECT MBRWithin(@g1,@g2), MBRWithin(@g2,@g1); +--------------------+--------------------+ | ... MySQL ...
