<s>
GeoTrellis	B-Application
is	O
an	O
open	B-Application
source	I-Application
,	O
geographic	O
data	O
processing	O
library	O
designed	O
to	O
work	O
with	O
large	O
geospatial	O
raster	O
data	O
sets	O
.	O
</s>
<s>
It	O
is	O
written	O
in	O
Scala	B-Application
and	O
has	O
an	O
open-source	B-Application
Apache	O
2.0	O
license	O
.	O
</s>
<s>
GeoTrellis	B-Application
 '	O
core	O
competency	O
is	O
raster	O
data	O
processing	O
:	O
enabling	O
distributed	O
processing	O
of	O
large	O
geospatial	O
raster	O
data	O
sets	O
using	O
the	O
techniques	O
of	O
map	O
algebra	O
.	O
</s>
<s>
In	O
addition	O
to	O
support	O
for	O
raster	O
data	O
operations	O
,	O
GeoTrellis	B-Application
includes	O
some	O
support	O
for	O
operations	O
using	O
vector	O
and	O
point	B-Algorithm
cloud	I-Algorithm
data	I-Algorithm
.	O
</s>
<s>
GeoTrellis	B-Application
leverages	O
Apache	B-Language
Spark	I-Language
for	O
distributed	O
processing	O
.	O
</s>
<s>
Distributed	O
processing	O
relies	O
on	O
indexing	O
large	O
datasets	O
based	O
on	O
a	O
multi-dimensional	O
space-filling	B-Algorithm
curve	I-Algorithm
(	O
SFC	O
)	O
.	O
</s>
<s>
Python	B-Language
bindings	B-Application
have	O
been	O
developed	O
for	O
GeoTrellis	B-Application
as	O
a	O
sub-project	O
called	O
GeoPySpark	O
that	O
enables	O
Python	B-Language
developers	O
to	O
access	O
and	O
use	O
the	O
GeoTrellis	B-Application
library	O
.	O
</s>
<s>
GeoTrellis	B-Application
started	O
as	O
a	O
research	O
project	O
at	O
Azavea	O
,	O
a	O
geospatial	O
software	O
company	O
based	O
in	O
Philadelphia	O
.	O
</s>
<s>
In	O
2009	O
,	O
with	O
financial	O
support	O
from	O
the	O
William	O
Penn	O
Foundation	O
and	O
Stroud	O
Water	O
Research	O
Center	O
,	O
Azavea	O
embarked	O
on	O
early	O
development	O
of	O
GeoTrellis	B-Application
.	O
</s>
<s>
GeoTrellis	B-Application
was	O
released	O
as	O
an	O
open	B-Application
source	I-Application
project	O
in	O
2011	O
with	O
the	O
goal	O
of	O
supporting	O
fast	O
processing	O
of	O
geospatial	O
raster	O
data	O
at	O
scale	O
.	O
</s>
<s>
GeoTrellis	B-Application
initially	O
supported	O
distributed	O
computation	O
through	O
Akka	B-Language
,	O
a	O
Scala	B-Application
framework	O
for	O
building	O
concurrent	O
and	O
distributed	O
applications	O
.	O
</s>
<s>
GeoTrellis	B-Application
moved	O
to	O
Apache	B-Language
Spark	I-Language
as	O
its	O
distribution	O
engine	O
in	O
2014	O
in	O
order	O
to	O
leverage	O
management	O
,	O
scheduling	O
,	O
and	O
other	O
features	O
in	O
the	O
Spark	B-Language
framework	O
.	O
</s>
<s>
The	O
move	O
to	O
Apache	B-Language
Spark	I-Language
enabled	O
efficient	O
support	O
for	O
large	O
climate	O
change	O
forecast	O
datasets	O
published	O
by	O
the	O
Intergovernmental	O
Panel	O
on	O
Climate	O
Change	O
(	O
IPCC	O
)	O
.	O
</s>
<s>
GeoTrellis	B-Application
was	O
submitted	O
to	O
the	B-Application
Eclipse	I-Application
Foundation	I-Application
's	O
LocationTech	O
working	O
group	O
in	O
2013	O
and	O
graduated	O
from	O
incubation	O
with	O
a	O
1.0	O
release	O
in	O
December	O
2016	O
.	O
</s>
<s>
GeoTrellis	B-Application
has	O
been	O
used	O
in	O
a	O
number	O
of	O
geospatial	O
domains	O
including	O
:	O
satellite	O
and	O
aerial	O
image	O
processing	O
,	O
forest	O
growth	O
simulation	O
,	O
agricultural	O
yield	O
predictions	O
,	O
planning	O
,	O
digital	O
humanities	O
,	O
government	O
infrastructure	O
investment	O
,	O
and	O
machine	O
learning	O
to	O
support	O
crime	O
risk	O
forecasting	O
.	O
</s>
<s>
It	O
is	O
currently	O
integrated	O
into	O
other	O
open	B-Application
source	I-Application
software	I-Application
projects	O
including	O
:	O
Raster	O
Foundry	O
,	O
Raster	O
Frames	O
,	O
and	O
GeoPySpark	O
.	O
</s>
