## 2 Study Area and Data Preparation
### Data Preparation
#### 2.2.2 Impact Factor
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Impact Factor** & **Type of Data** & **Class** & **Number Classified** & **Information Value** \\ \hline \multirow{8}{*}{Elevation (m)} & & \(<\)228 & 2,278,531 & 0.06201 \\  & & 228–388 & 3,191,332 & 0.38988 \\  & & 388–542 & 3,274,549 & 0.49857 \\  & Continuous & 542–700 & 3,040,129 & \(-\)0.32939 \\  & Data & 700–867 & 2,719,978 & \(-\)0.39579 \\  & & 867–1044 & 2,347,371 & \(-\)0.80346 \\  & & 1044–1258 & 1,734,651 & \(-\)0.11725 \\  & & \(>\)1258 & 621,414 & \(-\)2.21525 \\ \hline \multirow{8}{*}{Slope (\({}^{\circ}\))} & & \(<\)6.55 & 1,877,008 & \(-\)0.12175 \\  & & 6.55–12.15 & 2,406,548 & 0.26512 \\  & & 12.15–17.20 & 2,940,899 & 0.27359 \\  & Continuous & 17.20–22.00 & 3,193,375 & 0.22571 \\  & Data & 220–26.77 & 3,167,309 & 0.01710 \\  & & 26.77–31.85 & 2,797,168 & \(-\)0.45169 \\  & & 31.85–38.01 & 2,014,337 & \(-\)0.71689 \\  & & \(>\)38.01 & 782,341 & \(-\)0.33507 \\ \hline \multirow{8}{*}{Profile  Curvature (\({}^{\circ}\))} & & \(<\)\(-\)0.99 & 75,410 & 0 \\  & & \(-\)0.99—0.56 & 531,012 & \(-\)1.36489 \\  & & \(-\)0.56—0.30 & 1,815,337 & \(-\)0.82342 \\  & Continuous & \(-\)0.30—0.09 & 4,129,618 & \(-\)0.10186 \\  & Data & \(-\)0.09–0.07 & 4,676,975 & 0.10363 \\  & & 0.07–0.34 & 5,811,318 & 0.17171 \\  & & 0.34–0.71 & 1,849,367 & 0.07003 \\  & & \(>\)0.71 & 318,918 & 0.39773 \\ \hline \multirow{8}{*}{Plane  Curvature (\({}^{\circ}\))} & & \(<\)\(-\)0.81 & 145,796 & \(-\)0.76546 \\  & & \(-\)0.81—0.49 & 732,978 & \(-\)0.77093 \\  & & \(-\)0.49—0.25 & 2,163,078 & \(-\)0.27412 \\  & Continuous & \(-\)0.25—0.04 & 4,718,901 & 0.13632 \\  & Data & \(-\)0.04–0.12 & 5,078,221 & 0.24054 \\  & & 0.12–0.32 & 3,728,005 & 0.07489 \\  & & 0.32\(\sim\)0.64 & 2,157,47 & \(-\)0.59787 \\  & & \(>\)0.64 & 483,229 & \(-\)1.74060 \\ \hline \multirow{8}{*}{Roughness  Roughness} & & \(<\)1.03 & 5,377,703 & 0.13749 \\  & & 1.03–1.07 & 4,269,631 & 0.17292 \\  & & 1.07–1.11 & 3,467,593 & 0.15457 \\  & Continuous & 1.11–1.16 & 2,655,873 & \(-\)0.48079 \\  & Data & 1.16–1.22 & 1,839,959 & \(-\)0.70155 \\  & & 1.22–1.30 & 1,061,942 & \(-\)0.60389 \\  & & 1.30–1.44 & 42,885 & 2.04582 \\  & & \(>\)1.44 & 77,399 & \(-\)0.84721 \\ \hline \multirow{8}{*}{TWI \({}^{\star}\)} & & \(<\)4.72 & 5,047,898 & \(-\)0.41458 \\  & & 4.72–5.99 & 6,735,945 & \(-\)0.10016 \\  & & 5.99–7.48 & 4,335,641 & 0.35422 \\ \cline{1-1}  & Continuous & 7.48–9.54 & 1,560,640 & 0.28828 \\ \cline{1-1}  & Data & 9.54–12.41 & 594,284 & \(-\)0.22621 \\ \cline{1-1}  & & 12.41–15.97 & 255,777 & 0.05723 \\ \cline{1-1}  & & 15.97–21.13 & 587,706 & 0.11628 \\ \cline{1-1}  & & \(>\)21.13 & 61,094 & 0.32597 \\ \hline \multirow{8}{*}{NDTI \({}^{\star}\)} & & \(<\)\(-\)0.26 & 166,420 & \(-\)1.59091 \\  & & \(-\)0.26–0 & 251,407 & 1.23521 \\ \cline{1-1}  & & 0–0.17 & 384,950 & 1.59584 \\ \cline{1-1}  & Continuous & 0.17–0.33 & 574,193 & 1.31377 \\ \cline{1-1}  & Data & 0.33–0.45 & 1,176,441 & 0.75064 \\ \cline{1-1}  & & 0.45–0.54 & 3,170,522 & \(-\)0.11921 \\ \cline{1-1}  & & 0.54–0.61 & 6,417,901 & \(-\)0.30518 \\ \cline{1-1}  & & \(>\)0.61 & 7,066,170 & \(-\)0.51115 \\ \hline \end{tabular}
\end{table} 
Table 2: Results of IV values and influencing factors.