A tool to compute the landslide degree of risk using R-Studio and R-Shiny

Landslide risk zones are common in urban areas of Brazil. Around the world, studies to map landslide hazard are common and they use different methodologies; however, very few studies focus on mapping landslide risk areas. In occupied urban areas, mapping the landslide hazard doesn't solve the problem since now it is not a matter of being able or not to build in hazard zone but knowing where the risk areas are so the municipality can manage these areas closely. The City Ministry/IPT Methodology has been used to map the landslide degree of risk in many municipalities. This method requires fieldwork and a decision as to the degree of risk based on the personal judgment of technicians in the field and also require time and money. To make the degree of risk less dependent on the judgment of technicians in the field and allow municipalities to update their risk map, we have developed an app using RStudio software and the Shiny app package. The app computes the degree of risk automatically using data inputs and each parameter's weight. Consequently, the app makes it easy to calculate the degree of landslide risk and decreases the subjectivity. Moreover, it is a tool that is free of costs as it uses open source software. Local governments will be better able to create and update maps of their landslide risk areas. More importantly, this app will contribute to the mitigation of the landslide risk.