<s>
OpenSeaMap	B-Application
is	O
a	O
software	B-Application
project	I-Application
collecting	O
freely	O
usable	O
nautical	O
information	O
and	O
geospatial	B-General_Concept
data	I-General_Concept
to	O
create	O
a	O
worldwide	O
nautical	B-Application
chart	I-Application
.	O
</s>
<s>
This	O
chart	O
is	O
available	O
on	O
the	O
OpenSeaMap	B-Application
website	O
,	O
and	O
can	O
also	O
be	O
downloaded	O
for	O
use	O
as	O
an	O
electronic	O
chart	O
for	O
offline	O
applications	O
.	O
</s>
<s>
OpenSeaMap	B-Application
is	O
part	O
of	O
the	O
OpenStreetMap	O
database	O
,	O
and	O
complements	O
the	O
spatial	B-General_Concept
data	I-General_Concept
with	O
nautical	O
information	O
.	O
</s>
<s>
Such	O
data	O
may	O
be	O
used	O
in	O
accordance	O
with	O
the	O
Open	B-General_Concept
Database	I-General_Concept
License	I-General_Concept
.	O
</s>
<s>
In	O
January	O
2010	O
,	O
OpenSeaMap	B-Application
was	O
given	O
a	O
booth	O
at	O
boot	O
Düsseldorf	O
,	O
Europe	O
's	O
largest	O
boat	O
show	O
,	O
allowing	O
volunteers	O
to	O
present	O
the	O
project	O
to	O
a	O
large	O
audience	O
of	O
specialists	O
for	O
the	O
first	O
time	O
.	O
</s>
<s>
Charts	B-Application
will	O
show	O
lighthouses	B-Application
,	O
lateral	O
buoy	O
,	O
cardinal	O
marks	O
and	O
other	O
navigational	O
aids	O
.	O
</s>
<s>
The	O
data	O
are	O
presented	O
in	O
multiple	O
levels	O
with	O
OpenLayers	B-Language
on	O
the	O
base	O
map	O
of	O
OpenStreetMap	O
.	O
</s>
<s>
OpenSeaMap	B-Application
includes	O
additional	O
layers	O
such	O
as	O
aids	O
to	O
navigation	O
,	O
ports	O
and	O
temporary	O
racing	O
events	O
.	O
</s>
<s>
It	O
is	O
not	O
intended	O
to	O
replace	O
official	O
charts	B-Application
.	O
</s>
<s>
The	O
map	O
is	O
available	O
to	O
any	O
computer	O
with	O
an	O
internet	O
connection	O
from	O
the	O
website	O
OpenSeaMap.org	B-Application
.	O
</s>
<s>
The	O
map	O
can	O
also	O
be	O
loaded	O
on	O
local	O
data	B-General_Concept
storage	I-General_Concept
and	O
can	O
be	O
used	O
on	O
any	O
PC	O
without	O
internet	O
access	O
.	O
</s>
<s>
The	O
paid	O
App	B-Application
for	O
OpenSeaMap	B-Application
works	O
on	O
iPad	B-Device
,	O
iPhone	O
und	O
iPod	O
touch	O
.	O
</s>
<s>
With	O
internet	O
connection	O
the	O
app	B-Application
checks	O
if	O
there	O
is	O
a	O
newer	O
version	O
of	O
the	O
chart	O
.	O
</s>
<s>
The	O
app	B-Application
works	O
worldwide	O
.	O
</s>
<s>
Appropriate	O
navigation	O
tools	O
from	O
the	O
open	O
source	O
area	O
are	O
SeaClear	O
,	O
OpenCPN	B-Application
and	O
GPSANGLER	O
.	O
</s>
<s>
JOSM	B-Application
is	O
the	O
default	O
editor	O
for	O
OpenStreetMap	O
.	O
</s>
<s>
It	O
has	O
been	O
extended	O
for	O
use	O
on	O
navigational	B-Application
charts	I-Application
with	O
a	O
plugin	B-Application
.	O
</s>
<s>
Other	O
programs	O
can	O
access	O
the	O
XML-RPC	B-Protocol
interface	O
to	O
the	O
data	O
on	O
the	O
server	O
in	O
order	O
to	O
read	O
and	O
write	O
OpenSeaMap	B-Application
data	O
.	O
</s>
<s>
This	O
guide	O
is	O
organized	O
as	O
a	O
Wiki	B-Protocol
and	O
is	O
shaped	O
by	O
the	O
users	O
.	O
</s>
<s>
In	O
worldwide	O
weather	O
charts	B-Application
there	O
are	O
shown	O
weather	O
data	O
like	O
wind	O
speed	O
,	O
air	O
pressure	O
(	O
isobars	O
)	O
,	O
etc.	O
,	O
each	O
actualised	O
two	O
to	O
three	O
times	O
per	O
day	O
,	O
and	O
with	O
weather	O
forecast	O
up	O
to	O
three	O
days	O
.	O
</s>
<s>
For	O
each	O
harbor	O
there	O
is	O
a	O
Meteogram	B-Application
with	O
detailed	O
wind	O
forecasts	O
and	O
weather	O
information	O
for	O
eight	O
days	O
.	O
</s>
<s>
OpenSeaMap	B-Application
measures	O
water	O
depths	O
by	O
Crowdsourcing	O
.	O
</s>
<s>
By	O
"	O
View	O
Wikipedia-Links	O
"	O
OpenSeaMap	B-Application
displays	O
all	O
georeferenced	O
Wikipedia	O
articles	O
worldwide	O
as	O
Icon	O
,	O
and	O
optionally	O
as	O
gallery	O
of	O
all	O
pictures	O
from	O
Commons	O
.	O
</s>
