Variable

Classes

Variable description

Class frequency

(UCU with SI > 2.45)

Aspect (˚)

1

0 - 90

30.35

2

90 - 180

22.54

3

180 - 270

21.97

4

270 - 360

25.14

Land Use

1

Artificial surfaces

4.34

2

Permanent crops

4.34

3

Agricoltural areas

15.03

4

Forests

36.42

5

Scrub and/or herbaceous vegetation

32.66

6

Open spaces with little or no vegetation

7.23

DTM (m a.s.l.)

1

449 - 700

25.14

2

700 - 900

27.75

3

900 - 1100

31.79

4

1100 - 1300

10.98

5

1300 - 1500

4.05

6

1500 - 2150

0.29

Slope (˚)

1

0 - 5

6.07

2

5 - 10

11.56

3

10 - 20

22.25

4

20 - 30

21.97

5

30 - 40

19.36

6

40 - 50

16.76

7

50 - 75

2.02

Lithology

1

Quaternary deposits

12.14

2

Quaternary cemented deposits

6.07

3

Flysch deposits

18.79

4

Marly limestones

17.63

5

Marls and clay marls

10.69

6

Limestones, marls and clays alternations

13.58

7

Stratified limestone

8.67

8

Dolostones

12.43