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The relative threat associated with each fuel type-distance class was ranked (\u201cSpotting Rank\u201d), based on expert opinions on the most frequent spotting concerns observed during wildfires. The rank values were assigned risk scores (weighting factor), which were adjusted to normalize the areas (since the larger concentric circles cover much more area than smaller ones). Each raster pixel (50 metre resolution) was then assigned a total score based on the sum of risk values contributed by all pixels within a radius of 1-2 kilometres. Based on this total score, the landscape was categorized into 10 spotting classes ranging from low to extreme.The classes were created by automatic classification, using the \u201cnatural breaks (Jenks)\u201d setting of the ArcGIS 10.1 Spatial Analyst extension. Differences are caused by fuel type classes and distances, with no consideration given at this time to elevation or dominant wind direction. Future versions of this analysis will likely address both of these factors.Water bodies were overlaid on the rasterandassigned their own class, -1. A private managed forest land (PMFL) and private land (PL) mask was applied to the data due to fuel typing limitations in these areas. Each of these were given their own class. PMFL is class -2 and PL is class -3.For more information please see the Provincial Strategic Threat Analysis PSTA Report. Feature class name is 'WHSE_LAND_AND_NATURAL_RESOURCE.PROT_PSTA_SPOTTING_IMPACT_SP'. 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