<s>
The	O
Digital	B-Application
Chart	I-Application
of	I-Application
the	I-Application
World	I-Application
(	O
DCW	O
)	O
is	O
a	O
comprehensive	O
digital	O
map	O
of	O
Earth	O
.	O
</s>
<s>
It	O
is	O
the	O
most	O
comprehensive	O
geographical	B-Application
information	I-Application
system	I-Application
(	O
GIS	B-Application
)	O
global	O
database	O
that	O
is	O
freely	O
available	O
as	O
of	O
2006	O
,	O
although	O
it	O
has	O
not	O
been	O
updated	O
since	O
1992	O
.	O
</s>
<s>
The	O
thematic	O
layers	O
of	O
the	O
Digital	B-Application
Chart	I-Application
of	I-Application
the	I-Application
World	I-Application
are	O
:	O
</s>
