{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "Missoula County's mission is to provide quality public service to protect and enhance the wellbeing of the people, communities, and environment. The Community and Planning Services (CAPS) department supports the County's mission by providing reliable, current, accurate geospatial information for general mapping and planning purposes. A Community Wildfire Protection Plan (CWPP) is a community-based plan focused on identifying and addressing the local threat of wildfire. The CWPP determines what is at risk and provides a roadmap of actions for the community to address its wildfire risk. The purpose of this feature class is to provide information about relative wildfire hazard in Missoula County (depicted in Figure 1 of the 2018 Missoula County CWPP) in a geospatial format that can be used by geographic information systems (GIS) software for spatial analysis and mapping in support of community wildfire protection efforts. It is intended to be used in conjunction with the 2018 Missoula County Community Wildfire Protection Plan and, where applicable, the 2013 Seeley-Swan Fire Plan.", "description": "

This feature class contains polygon features that provide a cartographic representation of the estimated relative integrated wildfire hazard in Missoula County. These polygons depict spatial summaries of underlying raster data representing probabilistic components of wildfire risk, generated through spatial wildfire risk assessments for Missoula County and the Lolo National Forest.<\/SPAN><\/P>

Wildfire risk is a measure of both the probability and consequences of uncertain future wildfire events (Thompson, Zimmerman, Mindar, and Taber. 2016). Risk for any specific location is dependent on three components: the chances of a fire occurring there (burn probability or wildfire likelihood), the likely intensity of fire if it occurs, and the susceptibility of something of value at that location. For the 2018 Missoula County CWPP, fine-scale information on the susceptibility of homes was not readily available, but modeled estimates of burn probability and intensity were. The product of burn probability and expected intensity (flame length) is the integrated wildfire hazard depicted in this polygon feature class.<\/SPAN><\/P>

Raster data for burn probability were generated by the U.S. Forest Service's Rocky Mountain Research Station (RMRS) in a 2016 risk assessment for the Lolo National Forest, using the FSim large fire simulator system. Raster data for intensity was generated by the Anchor Point Group in a 2016 risk assessment for Missoula County, using FlamMap fire behavior modeling software and a 90th percentile weather scenario. Both approaches used landscape fuel conditions as of 2015, along with topography, historical weather, and wildfire ignition patterns to model fire behavior across all of Missoula County. Integrated wildfire hazard was calculated by RMRS by multiplying the raster layers of burn probability and average expected intensity (flame length). <\/SPAN><\/P>

The raster hazard data were then summarized by the polygons in this feature class to eliminate pixilation and avoid inappropriate fine-scale use of the raster modeling data. Raw hazard values were classified into quartiles to reflect the relative hazard across Missoula County. Each polygon represents a catchment area (local drainage area) for stream segments, as defined and delineated in the U.S. EPA's National Hydrography Dataset Plus (NHDPlus) version 2. For this dataset, catchment area polygon features with an area smaller than 40 acres were merged with neighboring polygons using GIS software. <\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "summary": "Missoula County's mission is to provide quality public service to protect and enhance the wellbeing of the people, communities, and environment. The Community and Planning Services (CAPS) department supports the County's mission by providing reliable, current, accurate geospatial information for general mapping and planning purposes. A Community Wildfire Protection Plan (CWPP) is a community-based plan focused on identifying and addressing the local threat of wildfire. The CWPP determines what is at risk and provides a roadmap of actions for the community to address its wildfire risk. The purpose of this feature class is to provide information about relative wildfire hazard in Missoula County (depicted in Figure 1 of the 2018 Missoula County CWPP) in a geospatial format that can be used by geographic information systems (GIS) software for spatial analysis and mapping in support of community wildfire protection efforts. It is intended to be used in conjunction with the 2018 Missoula County Community Wildfire Protection Plan and, where applicable, the 2013 Seeley-Swan Fire Plan.", "title": "Missoula County 2018 Relative Integrated Wildfire Hazard Classification Polygon Feature Class", "tags": [ "missoula county", "cwpp", "community", "wildfire", "protection", "plan", "2018", "relative wildfire hazard", "model", "annual burn probability", "likelihood", "intensity", "flame length", "wildfire risk" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 500000, "maxScale": 50000, "spatialReference": "", "accessInformation": "--Data Sources\n Rocky Mountain Research Station, U.S. Forest Service\n - 2018 Missoula County modeled Relative Wildfire Hazard dataset\n - 2016 Annual Burn Probability Estimate (FSim model output)\n \u2013 2015 Landscape fuel data (.LCP file) created from LANDFIRE 2012 data and the LANDFIRE Total Fuel Change Tool \n\nLANDFIRE Data Distribution Site \u2013 Topographic, Surface Fuel, Canopy Fuel, and Vegetation raster layers from LANDFIRE 2012, Version 1.3.0 \nhttps://www.landfire.gov/topographic.php\nhttps://www.landfire.gov/fuel.php\nhttps://www.landfire.gov/vegetation.php\nhttps://www.landfire.gov/version_comparison.php\n\nAnchor Point Group\n - 2016 Modeled 90th Percentile Flame Length Estimate (FlamMap model output) \n\n--Reference Publications \nHeadwaters Economics. 2016. A Comparison of Two Wildfire Risk Modeling Approaches in Missoula County, Montana. Bozeman, MT. \nMontana Department of Natural Resources & Conservation, Forestry Division. 2013. 2013 Seeley-Swan Fire Plan. Missoula, MT. http://dnrc.mt.gov/divisions/forestry/docs/fire-and-aviation/wui/SeeleySwanFirePlan_2013_RevisionFinal.pdf \n\nThompson, M.P., T. Zimmerman, D. Mindar, and M. Taber. 2016. Risk Terminology Primer: Basic Principles and a Glossary for the Wildland Fire Management Community. Fort Collins, CO: USDA Forest Service Rocky Mountain Research Station. Gen. Tech. Rep. RMRS-GTR-349. https://www.fs.usda.gov/treesearch/pubs/50912 \n\nScott, J.H., M.P. Thompson, and D.E. Calkin. 2013. A wildfire risk assessment framework for land and resource management. Fort Collins, CO: USDA Forest Service Rocky Mountain Research Station. Gen. Tech. Rep. RMRS-GTR-315. https://www.fs.fed.us/rmrs/publications/wildfire-risk-assessment-framework-land-and-resource-management \n\nFinney, Mark A.; McHugh, Charles W.; Grenfell, Isaac C.; Riley, Karin L.; Short, Karen C. 2011. A simulation of probabilistic wildfire risk components for the continental United States. Stochastic Environmental Research and Risk Assessment. 25: 973-1000.", "licenseInfo": "

The purpose of this feature class is to provide information about relative wildfire hazard in Missoula County (depicted in Figure 1 of the 2018 Missoula County CWPP) in a geospatial format that can be used by geographic information systems (GIS) software for spatial analysis and mapping in support of community wildfire protection efforts. It is intended to be used in conjunction with the 2018 Missoula County Community Wildfire Protection Plan and, where applicable, the 2013 Seeley-Swan Fire Plan. <\/SPAN><\/P>

The relative wildfire hazard information presented is an aggregate summary of the raw source data and is not appropriate for determining wildfire hazard for individual structures, parcels, or properties. The wildfire hazard classification used in this dataset is intended to make interpreting wildfire hazard estimates more convenient. Classifications such as \u201clow\u201d and\u201cmoderate\u201d risk do not mean that there is no risk. Many wildfires occur in areas other than \u201chigh\u201d or \u201cextreme\u201d risk areas, and can have negative consequences. For this reason, communities should consider all risk when discussing potential wildfire impacts. The data in this feature class has been converted from its original raster format. <\/SPAN><\/P>

While Missoula County has made all attempts to ensure the correctness and suitability of information under our control and to correct any problems or errors which have been brought to our attention, no representation or guarantee can be made as to the correctness or suitability of that information or any other linked information presented, referenced, or implied. No endorsement is intended or made of any hypertext link, product, service, or information either by its inclusion or exclusion from this dataset. The information provided is for reference only. Anyone using this information should first consult original records and personally verify the accuracy of any and all information/data provided. <\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "portalUrl": "" }