box2d
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## Name

box2d — The type representing a 2-dimensional bounding box.

## Description

`box2d` is a spatial data type used to represent the two-dimensional bounding box enclosing a geometry or collection of geometries. For example, the ST_Extent aggregate function returns a `box2d` object.

The representation contains the values `xmin, ymin, xmax, ymax`. These are the minimum and maximum values of the X and Y extents.

`box2d` objects have a text representation which looks like `BOX(1 2,5 6)`.

## Casting Behavior

This table lists the automatic and explicit casts allowed for this data type:

Cast To | Behavior
box3d | automatic
geometry | automatic

## See Also

Section 15.7, “PostGIS Box Functions”

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