This polygon shapefile represents fire perimeters in California as well as neighboring areas of Nevada, and Oregon, from 1878 to 2018. Fire and Resource Assessment Program (Calif.). (2019). California Fire Perimeters, 1878-2018. Fire and Resource Assessment Program (Calif.). Available at: https://purl.stanford.edu/bz909jx2658 This layer is presented in the WGS84 coordinate system for web display purposes. Downloadable data are provided in native coordinate system or projection.