<s>
GeoDa	B-Application
is	O
a	O
free	O
software	O
package	O
that	O
conducts	O
spatial	O
data	O
analysis	O
,	O
geovisualization	O
,	O
spatial	O
autocorrelation	O
and	O
spatial	O
modeling	O
.	O
</s>
<s>
It	O
runs	O
on	O
different	O
versions	O
of	O
Windows	B-Application
,	O
Mac	B-Application
OS	I-Application
,	O
and	O
Linux	B-Application
.	O
</s>
<s>
GeoDa	B-Application
has	O
powerful	O
capabilities	O
to	O
perform	O
spatial	O
analysis	O
,	O
multivariate	O
exploratory	O
data	O
analysis	O
,	O
and	O
global	O
and	O
local	O
spatial	O
autocorrelation	O
.	O
</s>
<s>
It	O
also	O
performs	O
basic	O
linear	B-General_Concept
regression	I-General_Concept
.	O
</s>
<s>
OpenGeoDa	O
is	O
released	O
under	O
the	O
GNU	B-License
GPL	I-License
version	O
3.0	O
.	O
</s>
<s>
GeoDa	B-Application
replaced	O
what	O
was	O
previously	O
called	O
DynESDA	O
,	O
a	O
module	O
that	O
worked	O
under	O
the	O
old	O
ArcView	B-Application
3.x	O
to	O
perform	O
exploratory	O
spatial	O
data	O
analysis	O
(	O
or	O
ESDA	O
)	O
.	O
</s>
<s>
Current	O
releases	O
of	O
GeoDa	B-Application
no	O
longer	O
depend	O
on	O
the	O
presence	O
of	O
ArcView	B-Application
or	O
other	O
GIS	O
packages	O
on	O
a	O
system	O
.	O
</s>
<s>
Projects	O
in	O
GeoDa	B-Application
basically	O
consist	O
of	O
a	O
shapefile	O
that	O
defines	O
the	O
lattice	O
data	O
,	O
and	O
an	O
attribute	O
table	O
in	O
a	O
.dbf	O
format	O
.	O
</s>
<s>
The	O
attribute	O
table	O
can	O
be	O
edited	O
inside	O
GeoDa	B-Application
.	O
</s>
<s>
The	O
package	O
is	O
specialized	O
in	O
exploratory	O
data	O
analysis	O
and	O
geo-visualization	O
,	O
where	O
it	O
exploits	O
techniques	O
for	O
dynamic	O
linking	B-Application
and	I-Application
brushing	I-Application
.	O
</s>
<s>
This	O
means	O
that	O
when	O
the	O
user	O
has	O
multiple	O
views	O
or	O
windows	B-Application
in	O
a	O
project	O
,	O
selecting	O
an	O
object	O
in	O
one	O
of	O
them	O
will	O
highlight	O
the	O
same	O
object	O
in	O
all	O
other	O
windows	B-Application
.	O
</s>
<s>
GeoDa	B-Application
also	O
is	O
capable	O
of	O
producing	O
histograms	B-Algorithm
,	O
box	B-Application
plots	I-Application
,	O
Scatter	B-Application
plots	I-Application
to	O
conduct	O
simple	O
exploratory	O
analyses	O
of	O
the	O
data	O
.	O
</s>
<s>
Dynamic	O
linking	B-Application
and	I-Application
brushing	I-Application
are	O
powerful	O
devices	O
as	O
they	O
allow	O
users	O
to	O
interactively	O
discover	O
or	O
confirm	O
suspected	O
patterns	O
of	O
spatial	O
arrangement	O
of	O
the	O
data	O
or	O
otherwise	O
discard	O
the	O
existence	O
of	O
those	O
.	O
</s>
<s>
A	O
very	O
interesting	O
device	O
available	O
in	O
GeoDa	B-Application
to	O
explore	O
global	O
patterns	O
of	O
autocorrelation	O
in	O
space	O
is	O
Anselin	O
's	O
Moran	O
scatterplot	B-Application
.	O
</s>
<s>
In	O
essence	O
,	O
Anselin	O
's	O
Moran	O
scatterplot	B-Application
presents	O
the	O
relation	O
of	O
the	O
variable	O
in	O
the	O
location	O
i	O
with	O
respect	O
to	O
the	O
values	O
of	O
that	O
variable	O
in	O
the	O
neighboring	O
locations	O
.	O
</s>
<s>
By	O
construction	O
,	O
the	O
slope	O
of	O
the	O
line	O
in	O
the	O
scatter	B-Application
plot	I-Application
is	O
equivalent	O
to	O
the	O
Moran	O
's	O
I	O
coefficient	O
.	O
</s>
<s>
If	O
the	O
slope	O
in	O
the	O
scatter	B-Application
plot	I-Application
is	O
negative	O
that	O
means	O
that	O
we	O
have	O
a	O
sort	O
of	O
checkerboard	O
pattern	O
or	O
a	O
sort	O
of	O
spatial	O
competition	O
in	O
which	O
high	O
values	O
in	O
a	O
variable	O
in	O
location	O
i	O
tend	O
to	O
be	O
co-located	O
with	O
lower	O
values	O
in	O
the	O
neighboring	O
locations	O
.	O
</s>
<s>
In	O
Anselin	O
's	O
Moran	O
scatter	B-Application
plot	I-Application
,	O
the	O
slope	O
of	O
the	O
curve	O
is	O
calculated	O
and	O
displayed	O
on	O
top	O
of	O
the	O
graph	O
.	O
</s>
<s>
This	O
functionality	O
is	O
available	O
in	O
GeoDa	B-Application
by	O
means	O
of	O
Anselin	O
's	O
Moran	O
scatter	B-Application
plot	I-Application
.	O
</s>
