Dr. Parrish said the maps would also lead to the mapping of landslides and tsunami coastal areas.
This study was performed in the framework of 'Inventory Mapping of Landslides induced by the Nepal Earthquake and Hazard Mapping of Future Landslides for Making the Plan of Better Reconstruction' (Principal investigator, Prof. Chigira) related to the April 2015 Nepal earthquake in the J-RAPID Program by Japan Science and Technology Agency (JST).
[Xu et al., 2012b] applied 6 different models in susceptibility mapping of landslides induced by the 2008 Wenchuan earthquake with SVM having a second best results outranked only by logistic regression.
Where FR 1, FR 2, FR 3 … FRn are the frequency ratio raster maps of landslide causal factors.
The frequency ratio raster maps of landslide causal factors with landslide and non-landslide points was extracted using ArcGIS tool and saved into dbf format.
Using random extractions of trees and iterative mapping, we investigate subsets of the full tree-ring sample to define optimal sampling strategy, sample depth and trees for the development of frequency maps of landslide reactivations.
The frequency ratio values were assigned to each factor classes and all these raster maps of landslide factors were added to produce the landslide susceptibility index maps based on the mathematical combination theory.
Then the frequency ratio value maps of landslide factors were added based on the mathematical combination rule in order to get the landslide susceptibility index maps for different combinations.
From the distribution map of landslide dams in Fig. 4, at first glance, it is immediately possible to notice a higher concentration of cases in the Alps and the northern Apennines than in the Southern part of Italy.
Until now researchers, who were engaged in the this model, were simply summing all the frequency ratio raster maps of landslide factors (Lee and Sambath 2006) or exclude one factor and sum all the remaining ones (Lee and Talib 2005).
