<s>
MrSID	B-Algorithm
(	O
pronounced	O
Mister	O
Sid	O
)	O
is	O
an	O
acronym	O
that	O
stands	O
for	O
multiresolution	O
seamless	O
image	O
database	O
.	O
</s>
<s>
It	O
is	O
a	O
file	O
format	O
(	O
filename	O
extension	O
.sid	O
)	O
developed	O
and	O
patented	O
by	O
LizardTech	O
(	O
in	O
October	O
2018	O
absorbed	O
into	O
Extensis	O
)	O
for	O
encoding	O
of	O
georeferenced	O
raster	B-Algorithm
graphics	I-Algorithm
,	O
such	O
as	O
orthophotos	B-General_Concept
.	O
</s>
<s>
MrSID	B-Algorithm
originated	O
as	O
the	O
result	O
of	O
research	O
efforts	O
at	O
Los	O
Alamos	O
National	O
Laboratory	O
(	O
LANL	O
)	O
.	O
</s>
<s>
MrSID	B-Algorithm
was	O
originally	O
developed	O
for	O
Geographic	B-Application
Information	I-Application
Systems	I-Application
(	O
GIS	B-Application
)	O
.	O
</s>
<s>
With	O
this	O
format	O
,	O
large	O
raster	B-Algorithm
image	I-Algorithm
files	O
such	O
as	O
aerial	O
photographs	O
or	O
satellite	O
imagery	O
are	O
compressed	B-General_Concept
and	O
can	O
be	O
quickly	O
viewed	O
without	O
having	O
to	O
decompress	O
the	O
entire	O
file	O
.	O
</s>
<s>
The	O
MrSID	B-Algorithm
(	O
.sid	O
)	O
format	O
is	O
supported	O
in	O
major	O
GIS	B-Application
applications	O
such	O
as	O
Autodesk	O
,	O
Bentley	O
Systems	O
,	O
CARIS	O
,	O
ENVI	B-Application
,	O
ERDAS	B-Application
,	O
ESRI	O
,	O
Global	B-Application
Mapper	I-Application
,	O
Intergraph	O
,	O
MapInfo	B-Application
,	O
QGIS	B-Application
and	O
MiraMon	O
.	O
</s>
<s>
According	O
to	O
the	O
Open	B-License
Source	I-License
Geospatial	O
Foundation	O
(	O
which	O
releases	O
GDAL	B-Language
)	O
,	O
MrSID	B-Algorithm
was	O
developed	O
"	O
under	O
the	O
aegis	O
of	O
the	O
U.S.	O
government	O
for	O
storing	O
fingerprints	O
for	O
the	O
FBI.	O
"	O
</s>
<s>
In	O
a	O
1996	O
entry	O
for	O
the	O
R&D	O
100	O
Awards	O
,	O
LANL	O
identified	O
other	O
uses	O
for	O
the	O
format	O
:	O
"	O
it	O
can	O
be	O
used	O
as	O
an	O
efficient	O
method	O
for	O
storing	O
and	O
retrieving	O
photographic	O
archives	O
;	O
it	O
can	O
store	O
and	O
retrieve	O
satellite	O
data	O
for	O
consumer	O
games	O
and	O
educational	O
CD-ROMs	O
;	O
and	O
it	O
is	O
well	O
suited	O
for	O
use	O
in	O
vehicle	B-Application
navigation	I-Application
systems	I-Application
.	O
</s>
<s>
Moreover	O
,	O
MrSID	B-Algorithm
holds	O
promise	O
for	O
being	O
used	O
in	O
image	B-General_Concept
compression	I-General_Concept
and	O
editing	O
for	O
desktop	O
publishing	O
and	O
nonlinear	O
digital	O
video	O
software.	O
"	O
</s>
<s>
For	O
certain	O
downloadable	O
images	O
(	O
such	O
as	O
maps	O
)	O
,	O
American	O
Memory	O
at	O
the	O
Library	O
of	O
Congress	O
began	O
using	O
MrSID	B-Algorithm
in	O
1996	O
;	O
in	O
January	O
2005	O
it	O
also	O
began	O
using	O
JPEG	O
2000	O
.	O
</s>
<s>
Depending	O
on	O
image	O
content	O
and	O
color	O
depth	O
,	O
compression	O
of	O
American	O
Memory	O
maps	O
is	O
typically	O
better	O
with	O
MrSID	B-Algorithm
,	O
which	O
on	O
average	O
achieves	O
a	O
compression	O
ratio	O
of	O
approximately	O
22:1	O
versus	O
the	O
20:1	O
achieved	O
with	O
JPEG	O
2000	O
.	O
</s>
<s>
Extensis	O
offers	O
a	O
software	O
package	O
called	O
GeoExpress	O
to	O
read	O
and	O
write	O
MrSID	B-Algorithm
files	O
.	O
</s>
<s>
They	O
also	O
provide	O
a	O
free	O
web	B-Application
browser	I-Application
plug-in	O
for	O
the	O
Microsoft	B-Application
Windows	I-Application
operating	I-Application
system	I-Application
.	O
</s>
<s>
Most	O
commercial	O
GIS	B-Application
software	I-Application
packages	O
can	O
read	O
some	O
versions	O
of	O
MrSID	B-Algorithm
files	O
including	O
those	O
from	O
GE	O
Smallworld	O
,	O
ESRI	O
,	O
Intergraph	O
,	O
Bentley	O
Systems	O
,	O
MapInfo	B-Application
,	O
Safe	O
Software	O
,	O
Autodesk	O
,	O
with	O
ERDAS	B-Application
IMAGINE	I-Application
being	O
able	O
to	O
both	O
read	O
and	O
write	O
MrSID	B-Algorithm
files	O
.	O
</s>
<s>
When	O
combined	O
with	O
LizardTech	O
's	O
Express	O
Server	O
,	O
.sid	O
and	O
.jp2	O
data	O
can	O
be	O
served	O
quickly	O
to	O
a	O
variety	O
of	O
GIS	B-Application
applications	O
and	O
other	O
client	O
applications	O
either	O
through	O
direct	O
integrations	O
or	O
via	O
WMS	B-Application
.	O
</s>
<s>
There	O
is	O
no	O
open	B-License
source	I-License
implementation	O
of	O
the	O
MrSID	B-Algorithm
format	O
.	O
</s>
<s>
Some	O
open	B-License
source	I-License
GIS	B-Application
systems	O
can	O
read	O
MrSID	B-Algorithm
files	O
,	O
including	O
MapWindow	B-Language
GIS	I-Language
and	O
those	O
based	O
on	O
GDAL	B-Language
.	O
</s>
<s>
This	O
enables	O
the	O
capability	O
to	O
implement	O
MrSID	B-Algorithm
reading	O
capability	O
in	O
any	O
application	O
.	O
</s>
<s>
Some	O
image	O
editing	O
and	O
management	O
software	O
systems	O
can	O
also	O
read	O
MrSID	B-Algorithm
files	O
,	O
including	O
XnView	B-Protocol
and	O
IrfanView	B-Protocol
.	O
</s>
<s>
MrSID	B-Algorithm
technology	O
uses	O
lossless	B-Algorithm
wavelet	O
compression	O
to	O
create	O
an	O
initial	O
image	O
.	O
</s>
<s>
While	O
2:1	O
compression	O
ratios	O
may	O
be	O
achieved	O
losslessly	B-Algorithm
,	O
higher	O
compression	O
rates	O
are	O
lossy	B-Algorithm
much	O
like	O
JPEG-compressed	O
data	O
.	O
</s>
<s>
MrSID	B-Algorithm
uses	O
selective	O
decoding	O
meaning	O
that	O
the	O
decoder	O
does	O
not	O
have	O
to	O
decode	O
the	O
entire	O
file	O
to	O
view	O
a	O
specific	O
zoom	O
level	O
,	O
image	O
quality	O
or	O
scene	O
for	O
example	O
.	O
</s>
