Oregon - Landslide Susceptibility Map - Oregon Spatial Data Library

This data layer is an element of the Oregon GIS Framework. The data in this raster depicts landslide susceptibility at a 10 meter resolution, across the state of Oregon. The data was created using Oregon Lidar Consortium (OLC) data, and USGS NED data where OLC data was not present. This elevation data was converted into slopes, and a multi pronged analysis process used these slopes, geology and mapped existing landslides to create this 10 meter raster. There are 4 classes of landslide susceptibility: Low, Moderate, High and Very High.

Climate, geology, and topography combine to make Oregon a landslide-prone state. Landslides are trigger by precipitation, earthquakes, and other factors. The growing Oregon population inevitably pushes development onto landslide-prone slopes, adding to the people and infrastructure at risk. Mitigating this risk starts with having detailed (large scale e.g. 1:8,000) landslide hazards maps. However, there is neither the data and/or capacity to create detailed landslide hazards maps across the entire state of Oregon. The purpose of this project was to create a generalized (coarse grid, small scale 1:500,000) landslide susceptibility overview map of the entire state. The intended use this overview map is to help identify regions (cities, counties, communities, portions of lifelines, etc.) that maybe more or less regionally at risk for future landslides. This landslide susceptibility data can help the state and communities prioritize areas for more detailed mapping