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The '''minimum bounding rectangle''' ('''MBR'''), also known as '''bounding box''' or '''envelope''', is an expression of the maximum extents of a 2-dimensional object (e.g. point, line, polygon) within its 2-D (x,y) [[coordinate system]], in other words min(x), max(x), min(y), max(y). The MBR is a 2-dimensional case of the [[minimum bounding box]].
MBRs are frequently used as an indication of the general position of a [[geography|geographic]] feature or dataset, for either display, first-approximation spatial query, or spatial indexing purposes.
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