<s>
Braunschweig	O
University	O
of	O
Technology	O
to	O
display	O
a	O
virtual	B-Application
globe	I-Application
of	O
the	O
earth	O
.	O
</s>
<s>
It	O
was	O
developed	O
before	O
Google	O
bought	O
Keyhole	O
,	O
Inc	O
and	O
changed	O
their	O
product	O
into	O
Google	B-Application
Earth	I-Application
.	O
</s>
<s>
Earth3D	B-Language
downloads	O
its	O
data	O
(	O
satellite	O
imagery	O
and	O
height	O
data	O
)	O
from	O
a	O
server	O
while	O
the	O
user	O
navigates	O
around	O
.	O
</s>
<s>
The	O
data	O
itself	O
is	O
saved	O
in	O
a	O
Quadtree	B-Data_Structure
.	O
</s>
<s>
One	O
of	O
the	O
strengths	O
of	O
Earth3D	B-Language
is	O
the	O
capacity	O
of	O
showing	O
meteorological	O
phenomena	O
,	O
like	O
Low-pressure	O
areas	O
,	O
anticyclones	O
,	O
etc	O
.	O
</s>
<s>
The	O
original	O
version	O
of	O
Earth3D	B-Language
was	O
developed	O
using	O
Trolltech	O
's	O
QT	B-Language
framework	I-Language
.	O
</s>
<s>
Later	O
a	O
version	O
built	O
with	O
Java	O
and	O
JOGL	B-Language
was	O
developed	O
.	O
</s>
<s>
This	O
may	O
be	O
because	O
NASA	O
's	O
WorldWind	B-Language
also	O
has	O
an	O
open	O
source	O
Java	O
version	O
.	O
</s>
