1 Scott, Joe H.; Gilberston-Day, Julie W.; Moran, Christopher; Dillon, Gregory K.; Short, Karen C.; Vogler, Kevin C.; "Wildfire Risk to Communities: Spatial Datasets of Landscape-wide Wildfire Risk Components for the United States." United States Forest Service; Fort Collins, CO (2020). Forest Service Research Data Archive (https://doi.org/10.2737/RDS-2020-0016).
2 Boryan, Claire; Yang, Zhengwei; Mueller, Rick; Craig, Mike; "Monitoring US Agriculture;" United States Department of Agriculture, National Agricultural Statistics Service, Cropland Data Layer Program. Geocarto International, 26:5, pp. 341-358 (2011). DOI: 10.1080/1010649.2011.562309. https://nassgeodata.gmu.edu/CropScape/.
3 Gollner, Michael; Hakes, Raquel; Caton, Sara; Kohler, Kyle; "Pathways for Building Fire Spread at the Wildland Interface: A Report to the Fire Protection Research Foundation" (2015). Data provided by Eva Karau at the USFS Rocky Mountain Research Station Fire Sciences Laboratory.
4 Gollner, Michael; Hakes, Raquel; Caton, Sara; Kohler, Kyle; "Pathways for Building Fire Spread at the Wildland Interface: A Report to the Fire Protection Research Foundation" (2015). Data provided by Eva Karau at the USFS Rocky Mountain Research Station Fire Sciences Laboratory.
5 Scott, Joe H.; Gilberston-Day, Julie W.; Moran, Christopher; Dillon, Gregory K.; Short, Karen C.; Vogler, Kevin C.; "Wildfire Risk to Communities: Spatial Datasets of Landscape-wide Wildfire Risk Components for the United States." United States Forest Service; Fort Collins, CO (2020). Forest Service Research Data Archive (https://doi.org/10.2737/RDS-2020-0016).
6 Gollner, Michael; Hakes, Raquel; Caton, Sara; Kohler, Kyle; "Pathways for Building Fire Spread at the Wildland Interface: A Report to the Fire Protection Research Foundation" (2015). Data provided by Eva Karau at the USFS Rocky Mountain Research Station Fire Sciences Laboratory.
7 Technique based on poster by Andrew Weiss of the Nature Conservancy. Accessed at http://www.jennesent.com/downloads/tpi-poster-tnc_18x22.pdf.