<s>
In	O
computing	O
,	O
GeoServer	B-Language
is	O
an	O
open-source	B-Application
server	O
written	O
in	O
Java	B-Language
that	O
allows	O
users	O
to	O
share	O
,	O
process	O
and	O
edit	O
geospatial	B-Application
data	I-Application
.	O
</s>
<s>
GeoServer	B-Language
has	O
evolved	O
to	O
become	O
an	O
easy	O
method	O
of	O
connecting	O
existing	O
information	O
to	O
virtual	B-Application
globes	I-Application
such	O
as	O
Google	B-Application
Earth	I-Application
and	O
NASA	B-Language
World	I-Language
Wind	I-Language
as	O
well	O
as	O
to	O
web-based	O
maps	O
such	O
as	O
OpenLayers	B-Language
,	O
Leaflet	B-Language
,	O
Google	B-Application
Maps	I-Application
and	O
Bing	B-Application
Maps	I-Application
.	O
</s>
<s>
GeoServer	B-Language
functions	O
as	O
the	O
reference	O
implementation	O
of	O
the	O
Open	O
Geospatial	O
Consortium	O
Web	O
Feature	O
Service	O
standard	O
,	O
and	O
also	O
implements	O
the	O
Web	B-Application
Map	I-Application
Service	I-Application
,	O
Web	B-Application
Coverage	I-Application
Service	I-Application
and	O
Web	O
Processing	O
Service	O
specifications	O
.	O
</s>
<s>
GeoServer	B-Language
aims	O
to	O
operate	O
as	O
a	O
node	O
within	O
a	O
free	O
and	O
open	O
Spatial	O
Data	O
Infrastructure	O
.	O
</s>
<s>
Just	O
as	O
the	O
Apache	B-Application
HTTP	I-Application
Server	I-Application
has	O
offered	O
a	O
free	O
and	O
open	O
web	O
server	O
to	O
publish	O
HTML	B-Language
,	O
GeoServer	B-Language
aims	O
to	O
do	O
the	O
same	O
for	O
geospatial	B-Application
data	I-Application
.	O
</s>
<s>
GeoServer	B-Language
reads	O
a	O
variety	O
of	O
data	O
formats	O
,	O
including	O
:	O
</s>
<s>
Through	O
standard	O
protocols	O
it	O
produces	O
KML	B-Application
,	O
GML	O
,	O
Shapefile	O
,	O
GeoRSS	O
,	O
PDF	B-Application
,	O
GeoJSON	B-General_Concept
,	O
JPEG	O
,	O
GIF	O
,	O
SVG	B-Application
,	O
PNG	O
and	O
more	O
.	O
</s>
<s>
GeoServer	B-Language
includes	O
an	O
integrated	O
OpenLayers	B-Language
client	O
for	O
previewing	O
data	O
layers	O
.	O
</s>
<s>
GeoServer	B-Language
additionally	O
supports	O
efficient	O
publishing	O
of	O
geospatial	B-Application
data	I-Application
to	O
Google	B-Application
Earth	I-Application
through	O
the	O
use	O
of	O
network	O
links	O
,	O
using	O
KML	B-Application
.	O
</s>
<s>
Advanced	O
features	O
for	O
Google	B-Application
Earth	I-Application
output	O
include	O
templates	O
for	O
customized	O
pop-ups	O
,	O
time	O
and	O
height	O
visualizations	O
,	O
and	O
"	O
super-overlays	O
"	O
.	O
</s>
<s>
GeoServer	B-Language
relies	O
on	O
GeoTools	B-Application
,	O
a	O
GIS	B-Application
library	O
.	O
</s>
<s>
GeoServer	B-Language
uses	O
the	B-Application
Spring	I-Application
Framework	I-Application
,	O
providing	O
a	O
request	O
dispatch	O
architecture	O
for	O
modules	O
implementing	O
OGC	O
services	O
.	O
</s>
<s>
GeoServer	B-Language
is	O
a	O
web	O
application	O
,	O
supporting	O
any	O
common	O
servlet	O
container	O
(	O
a	O
standalone	O
distribution	O
is	O
available	O
with	O
the	O
Jetty	B-Language
(	O
web	O
server	O
)	O
as	O
an	O
embedded	O
server	O
)	O
.	O
</s>
<s>
GeoWebCache	O
,	O
a	O
Java-based	O
caching	O
component	O
similar	O
to	O
TileCache	O
,	O
is	O
bundled	O
with	O
GeoServer	B-Language
,	O
but	O
available	O
separately	O
.	O
</s>
<s>
Similarly	O
,	O
GeoServer	B-Language
packages	O
GeoTools	B-Application
as	O
a	O
Java	B-Language
library	O
,	O
but	O
it	O
is	O
also	O
available	O
separately	O
.	O
</s>
<s>
GeoServer	B-Language
is	O
a	O
longstanding	O
application	O
and	O
has	O
undergone	O
several	O
architectural	O
changes	O
.	O
</s>
<s>
GeoServer	B-Language
1.0	O
was	O
built	O
around	O
the	O
STRUTS	O
framework	O
,	O
with	O
the	O
migration	O
to	O
Spring	O
and	O
Wicket	O
taking	O
place	O
for	O
GeoServer	B-Language
2.0	O
.	O
</s>
