Landslide susceptibility modeling

For landslide susceptibility analysis, we will follow these steps:

1. We will load a digital elevation model (DEM) from SRTM (provided in the Data folder of Chapter10).
2. Compute the slope from this DEM.
3. Reproject each file to the same projection system so that we can compare one with another.
4. Extract the elevation and slope values corresponding to the landslide location using the DEM file and the computed slope.
5. Classify areas as safe or unsafe using the range of slopes within which landslides have occurred.
6. Get random points in the safe zone and extract their elevation and slope values.
7. Using the elevation and slope values from both the unsafe and safe locations, fit a logistic regression model.
8. Using the coefficient of the fitted model, make a landslide susceptibility map.

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