<s>
LandSerf	B-Application
is	O
a	O
free	O
geographic	B-Application
information	I-Application
system	I-Application
for	O
editing	O
,	O
processing	O
and	O
visualizing	O
spatial	O
data	O
.	O
</s>
<s>
It	O
is	O
particularly	O
suited	O
to	O
handling	O
Digital	O
Digital	B-Application
Elevation	I-Application
Models	I-Application
(	O
DEMs	O
)	O
and	O
other	O
surface	O
models	O
.	O
</s>
<s>
It	O
is	O
written	O
in	O
Java	B-Language
and	O
runs	O
on	O
Windows	B-Application
,	O
Mac	B-Application
OS	I-Application
and	O
Linux	B-Application
platforms	O
.	O
</s>
<s>
The	O
first	O
version	O
of	O
LandSerf	B-Application
was	O
written	O
in	O
1996	O
as	O
a	O
platform	O
for	O
performing	O
scale-based	O
analysis	O
of	O
Digital	B-Application
Elevation	I-Application
Models	I-Application
.	O
</s>
<s>
Subsequent	O
releases	O
of	O
the	O
software	O
have	O
enhanced	O
its	O
visualization	O
capabilities	O
(	O
for	O
example	O
,	O
3d	O
real-time	O
flythroughs	O
using	O
OpenGL	B-Application
)	O
and	O
the	O
range	O
of	O
file	O
formats	O
it	O
can	O
import	O
and	O
export	O
.	O
</s>
<s>
With	O
the	O
addition	O
of	O
Vector	O
handling	O
(	O
1998	O
)	O
,	O
attribute	O
tables	O
(	O
2003	O
)	O
and	O
raster	O
and	O
Vector	O
overlay	O
(	O
2004	O
)	O
,	O
LandSerf	B-Application
can	O
be	O
regarded	O
as	O
an	O
example	O
of	O
a	O
Geographic	B-Application
Information	I-Application
System	I-Application
(	O
GIS	B-Application
)	O
.	O
</s>
<s>
LandSerf	B-Application
has	O
been	O
used	O
in	O
a	O
range	O
of	O
application	O
areas	O
including	O
landscape	O
visualization	O
,	O
geomorphology	O
,	O
ecology	O
,	O
archaeology	O
,	O
3d	O
gaming	O
,	O
GPS	O
mapping	O
and	O
file	O
format	O
conversion	O
.	O
</s>
<s>
LandSerf	B-Application
is	O
not	O
open	B-Application
source	I-Application
,	O
but	O
it	O
is	O
freely	O
available	O
and	O
has	O
a	O
documented	O
API	B-General_Concept
to	O
allow	O
Java	B-Language
programmers	O
to	O
customise	O
and	O
enhance	O
the	O
software	O
.	O
</s>
