(a1)
(a2)
(b1)
(b2)
(c1)
(c2)
(d1)
(d2)
(e1)
(e2)
Figure 4. Pre-landslide and post-landslide data: (a1), (b1), … (n1) are pre-landslide data; (a2),(b2),…(n2) are post-landslide
data.
Continued on next page.
354
May 2017
PHOTOGRAMMETRIC ENGINEERING & REMOTE SENSING
