Table 1 The characteristics of NDVI value under different elevation from 1987 to 2018 of Qin Mountains.

From: The pattern, change and driven factors of vegetation cover in the Qin Mountains region

Elevation Zone

Elevation range (m)

Area (%)

NDVI

Mean

Slope

Maximum

Minimum

Std

I

 < 1300

50.56

0.67

0.18

0.78

0.579

0.0568

II

1300–1800

20.20

0.71

0.15

0.816

0.605

0.0546

III

1800–3300

22.51

0.69

0.13

0.802

0.512

0.0597

IV

 > 3300

5.72

0.65

0.12

0.785

0.481

0.0785