<s>
In	O
computational	O
geometry	O
,	O
the	O
minimum	B-Algorithm
bounding	I-Algorithm
rectangle	I-Algorithm
(	O
MBR	O
)	O
,	O
also	O
known	O
as	O
bounding	B-Algorithm
box	I-Algorithm
(	O
BBOX	O
)	O
or	O
envelope	O
,	O
is	O
an	O
expression	O
of	O
the	O
maximum	O
extents	O
of	O
a	O
two-dimensional	O
object	O
(	O
e.g.	O
</s>
<s>
point	O
,	O
line	O
,	O
polygon	B-General_Concept
)	O
or	O
set	O
of	O
objects	O
within	O
its	O
coordinate	O
system	O
;	O
in	O
other	O
words	O
,	O
,	O
,	O
.	O
</s>
<s>
The	O
MBR	O
is	O
a	O
2-dimensional	O
case	O
of	O
the	O
minimum	B-Algorithm
bounding	I-Algorithm
box	I-Algorithm
.	O
</s>
<s>
MBRs	O
are	O
frequently	O
used	O
as	O
an	O
indication	O
of	O
the	O
general	O
position	O
of	O
a	O
geographic	O
feature	O
or	O
dataset	O
,	O
for	O
either	O
display	O
,	O
first-approximation	O
spatial	O
query	O
,	O
or	O
spatial	B-Algorithm
indexing	I-Algorithm
purposes	O
.	O
</s>
<s>
MBRs	O
are	O
also	O
an	O
essential	O
prerequisite	O
for	O
the	O
R-tree	B-Library
method	O
of	O
spatial	B-Algorithm
indexing	I-Algorithm
.	O
</s>
<s>
Owing	O
to	O
their	O
simplicity	O
of	O
expression	O
and	O
ease	O
of	O
use	O
for	O
searching	O
,	O
MBRs	O
(	O
frequently	O
as	O
"	O
bounding	B-Algorithm
box	I-Algorithm
"	O
or	O
"	O
bounding	O
coordinates	O
"	O
)	O
are	O
also	O
commonly	O
included	O
in	O
relevant	O
standards	O
for	O
geospatial	B-General_Concept
metadata	I-General_Concept
,	O
i.e.	O
</s>
<s>
metadata	O
that	O
describes	O
spatial	O
(	O
geographic	O
)	O
objects	O
;	O
examples	O
include	O
as	O
an	O
extension	O
to	O
the	O
Dublin	O
Core	O
metadata	O
scheme	O
,	O
"	O
Bounding	O
Coordinates	O
"	O
in	O
the	O
,	O
and	O
"	O
Geographic	O
Bounding	B-Algorithm
Box	I-Algorithm
"	O
in	O
the	O
(	O
2003	O
–	O
current	O
)	O
ISO	O
19115	O
Metadata	O
Standard	O
for	O
geographic	O
information	O
(	O
ISO/TC	O
211	O
)	O
.	O
</s>
<s>
Web-accessible	O
articles	O
that	O
deal	O
further	O
with	O
the	O
concept	O
of	O
the	O
MBR	O
include	O
"	O
Unlocking	O
the	O
Mysteries	O
of	O
the	O
Bounding	B-Algorithm
Box	I-Algorithm
"	O
by	O
Douglas	O
R	O
.	O
Caldwell	O
,	O
and	O
"	O
Geographic	O
Database	O
Search	O
Interfaces	O
and	O
the	O
Equatorial	O
Cylindrical	O
Equidistant	O
Projection	O
"	O
by	O
Ross	O
S	O
.	O
Swick	O
and	O
Kenneth	O
W	O
.	O
Knowles	O
.	O
</s>
