<s>
In	O
architecture	O
and	O
building	O
engineering	O
,	O
a	O
floor	B-Application
plan	I-Application
is	O
a	O
technical	B-Application
drawing	I-Application
to	O
scale	O
,	O
showing	O
a	O
view	O
from	O
above	O
,	O
of	O
the	O
relationships	O
between	O
rooms	O
,	O
spaces	O
,	O
traffic	O
patterns	O
,	O
and	O
other	O
physical	O
features	O
at	O
one	O
level	O
of	O
a	O
structure	O
.	O
</s>
<s>
Floor	B-Application
plans	I-Application
may	O
also	O
include	O
details	O
of	O
fixtures	O
like	O
sinks	O
,	O
water	O
heaters	O
,	O
furnaces	O
,	O
etc	O
.	O
</s>
<s>
Floor	B-Application
plans	I-Application
may	O
include	O
notes	O
for	O
construction	O
to	O
specify	O
finishes	O
,	O
construction	O
methods	O
,	O
or	O
symbols	O
for	O
electrical	O
items	O
.	O
</s>
<s>
It	O
is	O
also	O
called	O
a	O
plan	O
which	O
is	O
a	O
measured	O
plane	O
typically	O
projected	O
at	O
the	O
floor	O
height	O
of	O
,	O
as	O
opposed	O
to	O
an	O
elevation	O
which	O
is	O
a	O
measured	O
plane	O
projected	O
from	O
the	O
side	O
of	O
a	O
building	O
,	O
along	O
its	O
height	O
,	O
or	O
a	O
section	B-Application
or	O
cross	B-Application
section	I-Application
where	O
a	O
building	O
is	O
cut	O
along	O
an	O
axis	O
to	O
reveal	O
the	O
interior	O
structure	O
.	O
</s>
<s>
Objects	O
below	O
this	O
level	O
are	O
seen	O
,	O
objects	O
at	O
this	O
level	O
are	O
shown	O
'	O
cut	O
 '	O
in	O
plan-section	O
,	O
and	O
objects	O
above	O
this	O
vertical	O
position	O
within	O
the	O
structure	O
are	O
omitted	O
or	O
shown	O
dashed	O
.	O
</s>
<s>
Drawings	O
are	O
now	O
reproduced	O
using	O
plotters	B-Operating_System
and	O
large	O
format	O
xerographic	O
copiers	O
.	O
</s>
<s>
The	O
art	O
of	O
constructing	O
ground	B-Application
plans	I-Application
(	O
ichnography	B-Application
;	O
Gr	O
.	O
</s>
<s>
τὸ	O
ἴχνος	O
,	O
íchnos	O
,	O
"	O
track	O
,	O
trace	O
"	O
and	O
γράφειν	O
,	O
gráphein	O
,	O
"	O
to	O
write	O
"	O
;	O
pronounced	O
ik-nog-rəfi	O
)	O
was	O
first	O
described	O
by	O
Vitruvius	O
(	O
i.2	O
)	O
and	O
included	O
the	O
geometrical	O
projection	O
or	O
horizontal	O
section	B-Application
representing	O
the	O
plan	O
of	O
any	O
building	O
,	O
taken	O
at	O
such	O
a	O
level	O
as	O
to	O
show	O
the	O
outer	O
walls	O
,	O
with	O
the	O
doorways	O
,	O
windows	O
,	O
fireplaces	O
,	O
etc.	O
,	O
and	O
the	O
correct	O
thickness	O
of	O
the	O
walls	O
;	O
the	O
position	O
of	O
piers	O
,	O
columns	O
or	O
pilasters	O
,	O
courtyards	O
and	O
other	O
features	O
which	O
constitute	O
the	O
design	O
,	O
as	O
to	O
scale	O
.	O
</s>
<s>
A	O
floor	B-Application
plan	I-Application
is	O
not	O
a	O
top	O
view	O
or	O
birds	B-Application
eye	I-Application
view	I-Application
.	O
</s>
<s>
A	O
top	O
view	O
or	O
bird	B-Application
's	I-Application
eye	I-Application
view	I-Application
does	O
not	O
show	O
an	O
orthogonally	O
projected	O
plane	O
cut	O
at	O
the	O
typical	O
four	O
foot	O
height	O
above	O
the	O
floor	O
level	O
.	O
</s>
<s>
A	O
floor	B-Application
plan	I-Application
could	O
show	O
:	O
</s>
<s>
In	O
other	O
words	O
,	O
a	O
plan	O
is	O
a	O
section	B-Application
viewed	O
from	O
the	O
top	O
.	O
</s>
<s>
In	O
such	O
views	O
,	O
the	O
portion	O
of	O
the	O
object	O
above	O
the	O
plane	O
(	O
section	B-Application
)	O
is	O
omitted	O
to	O
reveal	O
what	O
lies	O
beyond	O
.	O
</s>
<s>
In	O
the	O
case	O
of	O
a	O
floor	B-Application
plan	I-Application
,	O
the	O
roof	O
and	O
upper	O
portion	O
of	O
the	O
walls	O
may	O
typically	O
be	O
omitted	O
.	O
</s>
<s>
Whenever	O
an	O
interior	O
design	O
project	O
is	O
being	O
approached	O
,	O
a	O
floor	B-Application
plan	I-Application
is	O
the	O
typical	O
starting	O
point	O
for	O
any	O
further	O
design	O
considerations	O
and	O
decisions	O
.	O
</s>
<s>
It	O
is	O
often	O
used	O
in	O
technical	B-Application
drawing	I-Application
and	O
is	O
traditionally	O
crosshatched	O
.	O
</s>
<s>
The	O
style	O
of	O
crosshatching	O
indicates	O
the	O
type	O
of	O
material	O
the	O
section	B-Application
passes	O
through	O
.	O
</s>
<s>
A	O
3D	B-Algorithm
floor	I-Algorithm
plan	I-Algorithm
can	O
be	O
defined	O
as	O
a	O
virtual	O
model	O
of	O
a	O
building	O
floor	B-Application
plan	I-Application
.	O
</s>
<s>
It	O
is	O
often	O
used	O
to	O
better	O
convey	O
architectural	B-Application
plans	I-Application
to	O
individuals	O
not	O
familiar	O
with	O
floor	B-Application
plans	I-Application
.	O
</s>
<s>
Despite	O
the	O
purpose	O
of	O
floor	B-Application
plans	I-Application
originally	O
being	O
to	O
depict	O
3D	O
layouts	O
in	O
a	O
2D	O
manner	O
,	O
technological	O
expansion	O
has	O
made	O
rendering	O
3D	O
models	O
much	O
more	O
cost	O
effective	O
.	O
</s>
<s>
This	O
allows	O
a	O
greater	O
appreciation	O
of	O
scale	O
than	O
with	O
traditional	O
2D	O
floor	B-Application
plans	I-Application
.	O
</s>
