Seismic vulnerability assessment of residential buildings using logistic regression and geographic information system (GIS) in Pleret Sub District (Yogyakarta, Indonesia)

Geoenvironmental Disasters

Table 12 The example of the calculation of predicted damage categories

No	Freq	Str	Rf	Dist	Geo	Structure			Roof				Distance				Geology				Sum (Y*i)	DC
No	Freq	Str	Rf	Dist	Geo	Str 0	Str 1	Str 2	Rf 0	Rf 1	Rf 2	Rf 3	Dst 1	Dst 2	Dst 3	Dst 4	Geo 0	Geo 1	Geo 2	Geo 3
1	22	0	2	2	0	−0.255	0	0	0	0	1.634	0	0	0.949	0	0	−1.413	0	0	0	0.915	1
2	3	0	2	2	1	−0.255	0	0	0	0	1.634	0	0	0.949	0	0	0	−0.64	0	0	1.688	2
3	1	0	2	3	0	−0.255	0	0	0	0	1.634	0	0	0	0.744	0	−1.413	0	0	0	0.71	1
4	37	0	2	3	2	−0.255	0	0	0	0	1.634	0	0	0	0.744	0	0	0	1.507	0	3.63	3
5	66	0	2	4	2	−0.255	0	0	0	0	1.634	0	0	0	0	0	0	0	1.507	0	2.886	3
6	1	1	2	2	3	0	0.685	0	0	0	1.634	0	0	0.949	0	0	0	0	0	0	3.268	3
7	25	2	0	2	0	0	0	0	0.43	0	0	0	0	0.949	0	0	−1.413	0	0	0	−0.034	1
8	30	2	0	2	1	0	0	0	0.43	0	0	0	0	0.949	0	0	0	−0.64	0	0	0.739	1
9	10	2	0	2	2	0	0	0	0.43	0	0	0	0	0.949	0	0	0	0	1.507	0	2.886	3
10	1	2	0	2	3	0	0	0	0.43	0	0	0	0	0.949	0	0	0	0	0	0	1.379	1

n = 33
Freq: Frequency; Str: Structure; Rf: Roof; Dist: Distance from the epicentre of the Yogyakarta earthquake 2006; Geo: Geology; Str 0: Wood structure; Str 1: Unreinforced masonry; Str 2: Reinforced masonry; Rf 0: Asbestos or zinc roof; Rf 1: Cement tile roof; Rf 2: Clay tile roof; Rf 3: Concrete slap roof; Dst 1: within 8 km from the epicentre; Dst 2: between 8.1 and 10 km; Dst 3: between 10.1 and 12 km; Dst 4: Between 12.1 and 15 km; Geo 0: Semilir Formation; Geo 1: Alluvium; Geo 2: Young Merapi volcanic deposits; and Geo 3: Nglanggran Formation