<s>
GeoSTAC	B-Application
is	O
a	O
set	O
of	O
spatial	B-General_Concept
data	I-General_Concept
and	O
tools	O
accessed	O
through	O
a	O
Geographic	B-Application
Information	I-Application
System	I-Application
.	O
</s>
<s>
GeoSTAC	B-Application
concentrates	O
on	O
agricultural	O
and	O
environmental	O
GIS	B-Application
issues	O
.	O
</s>
<s>
One	O
of	O
the	O
primary	O
reasons	O
for	O
GeoSTAC	B-Application
is	O
to	O
understand	O
the	O
agricultural	O
landscape	O
and	O
the	O
interaction	O
of	O
important	O
environmental	O
variables	O
.	O
</s>
<s>
GeoSTAC	B-Application
runs	O
within	O
the	O
ESRI	O
ArcGIS	B-Application
software	O
platform	O
(	O
ESRI	O
,	O
Redlands	O
,	O
CA	O
)	O
with	O
the	O
ESRI	O
Spatial	O
Analyst	O
extension	O
.	O
</s>
<s>
With	O
GeoSTAC	B-Application
,	O
users	O
can	O
perform	O
geospatial	B-General_Concept
analysis	O
that	O
involves	O
:	O
</s>
<s>
The	O
databases	O
within	O
GeoSTAC	B-Application
cover	O
all	O
or	O
part	O
of	O
the	O
United	O
States	O
,	O
although	O
the	O
methods	O
can	O
be	O
applied	O
to	O
any	O
area	O
for	O
which	O
data	O
is	O
available	O
.	O
</s>
<s>
Many	O
of	O
the	O
operations	O
possible	O
with	O
GeoSTAC	B-Application
could	O
be	O
performed	O
manually	O
by	O
proficient	O
GIS	B-Application
users	O
.	O
</s>
<s>
However	O
,	O
GeoSTAC	B-Application
enables	O
these	O
to	O
be	O
performed	O
more	O
easily	O
and	O
with	O
much	O
of	O
the	O
data	O
necessary	O
already	O
collated	O
.	O
</s>
