# Minimum bounding rectangle (MBR)

The MBR of a geometry is the bounding geometry formed by the minimum and maximum (X,Y) coordinates.

Except for the following special cases, the MBRs of geometries
form a boundary rectangle when:

- The MBR of any point is the point itself, because its minimum and maximum X coordinates are the same and its minimum and maximum Y coordinates are the same.
- The MBR of a horizontal or vertical linestring is a linestring represented by the boundary (the endpoints) of the source linestring.