Modeling and Testing Landslide Hazard Using Decision Tree

Table 2

Tree table using CRT method.

Node	0		1		Total		Predicted category	Parent node	Primary independent variable
	𝑁	Percent	𝑁	Percent	𝑁	Percent			Variable	Improvement	Split values
0	68786	50.0%	68786	50.0%	137572	100.0%	1
1	31018	95.8%	1347	4.2%	32365	23.5%	0	0	𝑉15	0.129	≤0.03725
2	37768	35.9%	67439	64.1%	105207	76.5%	1	0	𝑉15	0.129	>0.03725
3	29797	99.0%	314	1.0%	30111	21.9%	0	1	𝑉16	0.006	≤0.04580
4	1221	54.2%	1033	45.8%	2254	1.6%	0	1	𝑉16	0.006	>0.04580
5	15591	28.3%	39565	71.7%	55156	40.1%	1	2	𝑉19	0.010	≤0.02120
6	22177	44.3%	27874	55.7%	50051	36.4%	1	2	𝑉19	0.010	>0.02120
7	379	36.0%	674	64.0%	1053	0.8%	1	4	𝑉17	0.001	≤0.00958
8	842	70.1%	359	29.9%	1201	0.9%	0	4	𝑉17	0.001	>0.00958
9	6228	37.4%	10421	62.6%	16649	12.1%	1	5	𝑉3	0.003	≤0.01292
10	9363	24.3%	29144	75.7%	38507	28.0%	1	5	𝑉3	0.003	>0.01292
11	3727	75.5%	1207	24.5%	4934	3.6%	0	6	𝑉16	0.008	≤0.05104
12	18450	40.9%	26667	59.1%	45117	32.8%	1	6	𝑉16	0.008	>0.05104
13	237	28.0%	608	72.0%	845	0.6%	1	7	𝑉12	0.000	≤0.15625
14	142	68.3%	66	31.7%	208	0.2%	0	7	𝑉12	0.000	>0.15625
15	216	99.5%	1	0.5%	217	0.2%	0	8	𝑉15	0.000	≤0.02376
16	626	63.6%	358	36.4%	984	0.7%	0	8	𝑉15	0.000	>0.02376
17	1305	61.2%	829	38.8%	2134	1.6%	0	9	𝑉17	0.002	≤0.02659
18	4923	33.9%	9592	66.1%	14515	10.6%	1	9	𝑉17	0.002	>0.02659
19	3413	30.0%	7980	70.0%	11393	8.3%	1	10	𝑉18	0.001	≤0.05873
20	5950	21.9%	21164	78.1%	27114	19.7%	1	10	𝑉18	0.001	>0.05873
21	48	28.4%	121	71.6%	169	0.1%	1	11	𝑉13	0.001	≤0.10
22	3679	77.2%	1086	22.8%	4765	3.5%	0	11	𝑉13	0.001	>0.10
23	10966	47.6%	12083	52.4%	23049	16.8%	1	12	𝑉3	0.003	≤0.02510
24	7484	33.9%	14584	66.1%	22068	16.0%	1	12	𝑉3	0.003	>0.02510
25	68	98.6%	1	1.4%	69	0.1%	0	14	𝑉12	0.000	≤0.21875
26	74	53.2%	65	46.8%	139	0.1%	0	14	𝑉12	0.000	>0.21875
27	232	47.5%	256	52.5%	488	0.4%	1	16	𝑉21	0.000	≤0.4375
28	394	79.4%	102	20.6%	496	0.4%	0	16	𝑉21	0.000	>0.4375
29	758	79.2%	199	20.8%	957	0.7%	0	17	𝑉15	0.001	≤0.07812
30	547	46.5%	630	53.5%	1177	0.9%	1	17	𝑉15	0.001	>0.07812
31	3200	29.5%	7633	70.5%	10833	7.9%	1	18	𝑉13	0.001	≤0.50
32	1723	46.8%	1959	53.2%	3682	2.7%	1	18	𝑉13	0.001	>0.50
33	1828	22.1%	6450	77.9%	8278	6.0%	1	19	𝑉17	0.003	≤0.17214
34	1585	50.9%	1530	49.1%	3115	2.3%	0	19	𝑉17	0.003	>0.17214
35	5873	21.7%	21164	78.3%	27037	19.7%	1	20	𝑉18	0.001	≤0.46488
36	77	100.0%	0	0.0%	77	0.1%	0	20	𝑉18	0.001	>0.46488
37	2179	71.4%	873	28.6%	3052	2.2%	0	22	𝑉1	0.000	≤0.15385
38	1500	87.6%	213	12.4%	1713	1.2%	0	22	𝑉1	0.000	>0.15385
39	5193	59.2%	3577	40.8%	8770	6.4%	0	23	𝑉18	0.003	≤0.08809
40	5773	40.4%	8506	59.6%	14279	10.4%	1	23	𝑉18	0.003	>0.08809
41	7078	32.9%	14405	67.1%	21483	15.6%	1	24	𝑉17	0.001	≤0.52185
42	406	69.4%	179	30.6%	585	0.4%	0	24	𝑉17	0.001	>0.52185