<s>
The	O
Web	B-Application
Coverage	I-Application
Processing	I-Application
Service	I-Application
(	O
WCPS	O
)	O
defines	O
a	O
language	O
for	O
filtering	O
and	O
processing	O
of	O
multi-dimensional	O
raster	O
coverages	B-General_Concept
,	O
such	O
as	O
sensor	O
,	O
simulation	O
,	O
image	O
,	O
and	O
statistics	O
data	O
.	O
</s>
<s>
The	O
Web	B-Application
Coverage	I-Application
Processing	I-Application
Service	I-Application
is	O
maintained	O
by	O
the	O
Open	O
Geospatial	O
Consortium	O
(	O
OGC	O
)	O
.	O
</s>
<s>
This	O
raster	O
query	O
language	O
allows	O
clients	O
to	O
obtain	O
original	O
coverage	B-General_Concept
data	I-General_Concept
,	O
or	O
derived	O
information	O
,	O
in	O
a	O
platform-neutral	O
manner	O
over	O
the	O
Web	O
.	O
</s>
<s>
As	O
the	O
WCPS	O
language	O
is	O
not	O
tied	O
to	O
any	O
particular	O
transmission	O
protocol	O
,	O
the	O
query	O
paradigm	O
can	O
be	O
embedded	O
into	O
any	O
service	O
framework	O
,	O
such	O
as	O
OGC	O
Web	B-Application
Coverage	I-Application
Service	I-Application
(	O
WCS	O
)	O
and	O
OGC	O
Web	O
Processing	O
Service	O
(	O
WPS	O
)	O
.	O
</s>
<s>
Currently	O
,	O
WCPS	O
is	O
constrained	O
to	O
multi-dimensional	O
raster	B-Algorithm
data	I-Algorithm
,	O
but	O
an	O
activity	O
is	O
under	O
work	O
in	O
OGC	O
to	O
extend	O
it	O
to	O
all	O
coverage	O
types	O
,	O
i.e.	O
,	O
digital	O
geospatial	O
information	O
representing	O
space-varying	O
phenomena	O
as	O
defined	O
in	O
OGC	O
Abstract	O
Specification	O
Topic	O
6	O
:	O
Schema	O
for	O
Coverage	O
Geometry	O
and	O
Functions	O
(	O
which	O
is	O
identical	O
to	O
ISO	O
19123	O
)	O
and	O
refined	O
to	O
a	O
concrete	O
,	O
interoperable	O
model	O
in	O
the	O
OGC	O
GML	O
3.2.1	O
Application	O
Schema	O
-	O
Coverages	B-General_Concept
(	O
GMLCOV	O
)	O
Standard	O
.	O
</s>
<s>
WCPS	O
establishes	O
a	O
protocol	O
to	O
send	O
a	O
query	O
string	O
to	O
a	O
server	O
and	O
obtain	O
,	O
as	O
a	O
result	O
of	O
the	O
server	O
's	O
processing	O
,	O
a	O
set	O
of	O
coverages	B-General_Concept
.	O
</s>
<s>
Task	O
is	O
to	O
inspect	O
three	O
coverages	B-General_Concept
M1	O
,	O
M2	O
,	O
and	O
M3	O
;	O
for	O
each	O
one	O
,	O
deliver	O
the	O
pixelwise	O
difference	O
of	O
red	O
and	O
near-infrared	O
(	O
nir	O
)	O
channel	O
;	O
return	O
the	O
result	O
encoded	O
in	O
HDF5	O
:	O
</s>
<s>
This	O
will	O
return	O
three	O
coverages	B-General_Concept
,	O
that	O
is	O
:	O
three	O
HDF5	O
files	O
.	O
</s>
<s>
Next	O
,	O
we	O
are	O
interested	O
only	O
in	O
those	O
coverages	B-General_Concept
where	O
nir	O
exceeds	O
127	O
somewhere	O
:	O
</s>
<s>
The	O
result	O
might	O
be	O
only	O
two	O
coverages	B-General_Concept
that	O
pass	O
the	O
filter	O
.	O
</s>
