concluded that detection and classification of landslide hazards is difficult without reliable references (domain knowledge). Figure 7.4. Comparison of geotechnical experts’ evaluations POINT-BASED LANDSLIDE DETECTION This investigation aimed at assessing the feasibility of using local surface point characterization to identify likely landslide areas. First, the overall statistics were computed for the surveyed area, which is shown in Table 8.1. Note that surrounding areas, marked by T around the respective sites, are used for control purpose, as non-landslide regions. Number of Density GSD Dataset grid points [ft] [ft] 2008 2012 8 2 8 2 Landslides 3,931 5,850 0.23 0.33 2.07 1.75 1 Landslides 498 714 0.22 0.29 2.12 1.86 Landslides 437 511 0.25 0.31 1.99 1.79 3 Landslides 579 1,023 0.24 0.42 2.03 1.55 4 Landslides 1,016 1,154 0.33 0.39 1.75 1.61 Landslides 493 353 0.26 0.21 1.95 2.19 Landslides 7,947 13,512 0.37 0.67 1.64 1.23 Landslides 22,232 27,911 0.32 0.41 1.77 1.56 Landslides 35,661 38,479 0.47 0.53 1.46 1.37 T1234 0.22 0.32 2.14 1.77 T56 40,360 52,198 0.17 0.22 2.44 2.13 T7 38,774 75,031 0.18 0.35 2.36 1.69 T89 82,885 0.18 0.37 2.38 1.64
concluded that detection and classification of landslide hazards is difficult without reliable references (domain knowledge). Figure 7.4. Comparison of geotechnical experts’ evaluations POINT-BASED LANDSLIDE DETECTION This investigation aimed at assessing the feasibility of using local surface point characterization to identify likely landslide areas. First, the overall statistics were computed for the surveyed area, which is shown in Table 8.1. Note that surrounding areas, marked by T around the respective sites, are used for control purpose, as non-landslide regions. Dataset Number of grid points Density [ft] GSD [ft] 2008 2012 Landslides 1 3,931 5,850 0.23 0.33 2.07 1.75 Landslides 2 498 714 0.22 0.29 2.12 1.86 Landslides 3 437 511 0.25 0.31 1.99 1.79 Landslides 4 579 1,023 0.24 0.42 2.03 1.55 Landslides 1,016 1,154 0.33 0.39 1.75 1.61 Landslides 493 353 0.26 0.21 1.95 2.19 Landslides 7,947 13,512 0.37 0.67 1.64 1.23 Landslides 22,232 27,911 0.32 0.41 1.77 1.56 Landslides 35,661 38,479 0.47 0.53 1.46 1.37 T1234 0.22 0.32 2.14 1.77 T56 40,360 52,198 0.17 0.22 2.44 2.13 T7 38,774 75,031 0.18 0.35 2.36 1.69 T89 82,885 0.18 0.37 2.38 1.64 2 8 8