Description
----------- 
The MBR (Minimum Bounding Rectangle), or Envelope is the
bounding
geometry, formed by the minimum and maximum (X,Y)
coordinates:
 
Examples
-------- 
((MINX MINY, MAXX MINY, MAXX MAXY, MINX MAXY, MINX MINY))
 

 
 
 
 
 
 
 

URL: https://mariadb.com/kb/en/mbr-definition/