Geoscience Reference
In-Depth Information
for crisp sets
⊧
1
if
x
≤
500
(
)
x
=
μ
⊨
0
if
x
>
500
⊩
Fig. 3 Membership function
—
forests
1
l
ðÞ¼
500
2
x
1
þ
Forests accessibility (Fa) (data CEDA StreetNet, distance, meter)
Overlay
—
Fuzzy Membership
—
Small (midpoint 500, spread 2)
—
Somewhat
(dilatation) (Fig.
3
).
s
1
l
ðÞ¼
500
2
1
þ
x
Bodies of water (Bv) (data CEDA StreetNet, distance, meter)
Map Algebra
—
Raster calculator (Fig.
4
).
8
<
1
if x
\
100
4000
x
3900
l
ðÞ¼
if 100
x
4000
:
0
if x
[
1000
Roads (Ro)
—
motorways and national roads (data CEDA StreetNet, distance,
meter)
Map Algebra
—
Raster calculator (Fig.
5
)
8
<
1
2
x
4000
x
4000
if
1
cos p
4000
\
x
\
10000
if
1
l
ðÞ¼
30000
x
20000
:
10000
x
30000
if
x
[
30000
if
0
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