<s>
Decimal	B-General_Concept
degrees	I-General_Concept
(	O
DD	O
)	O
is	O
a	O
notation	O
for	O
expressing	O
latitude	O
and	O
longitude	O
geographic	O
coordinates	O
as	O
decimal	O
fractions	O
of	O
a	O
degree	O
.	O
</s>
<s>
DD	O
are	O
used	O
in	O
many	O
geographic	B-Application
information	I-Application
systems	I-Application
(	O
GIS	B-Application
)	O
,	O
web	O
mapping	O
applications	O
such	O
as	O
OpenStreetMap	O
,	O
and	O
GPS	O
devices	O
.	O
</s>
<s>
Decimal	B-General_Concept
degrees	I-General_Concept
are	O
an	O
alternative	O
to	O
using	O
sexagesimal	O
degrees	O
(	O
degrees	O
,	O
minutes	O
,	O
and	O
seconds	O
-	O
DMS	O
notation	O
)	O
.	O
</s>
<s>
A	O
value	O
in	O
decimal	B-General_Concept
degrees	I-General_Concept
to	O
a	O
precision	O
of	O
4	O
decimal	O
places	O
is	O
precise	O
to	O
at	O
the	O
equator	O
.	O
</s>
<s>
A	O
value	O
in	O
decimal	B-General_Concept
degrees	I-General_Concept
to	O
5	O
decimal	O
places	O
is	O
precise	O
to	O
at	O
the	O
equator	O
.	O
</s>
<s>
A	O
DMS	O
value	O
is	O
converted	O
to	O
decimal	B-General_Concept
degrees	I-General_Concept
using	O
the	O
formula	O
:	O
</s>
<s>
where	O
is	O
the	O
absolute	O
value	O
of	O
and	O
is	O
the	O
truncation	B-Algorithm
function	O
.	O
</s>
