{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "This dataset adds housing density class (DEN4) and wildfire hazard (FHSZ) attributes to WUI12_2 - FRAP\u2019s preliminary result in an effort to capture Wildland Urban Interface (WUI) for the 2015 Assessment. The current dataset is appropriate for displaying the overall pattern of WUI development at the county level, and comparing counties in terms of development patterns. Until the dataset is refined through a field review process, it is not suited for WUI designations for individual houses or neighborhoods. \n\nThree WUI classes are mapped: \n1) Wildland Urban Interface \u2013 dense housing adjacent to vegetation that can burn in a wildfire,\n2) Wildland Urban Intermix - housing development interspersed in an area dominated by wildland vegetation subject to wildfire, and \n3) Wildfire Influence Zone - wildfire susceptible vegetation up to 1.5 miles from Wildland Urban Interface or Wildland Urban Intermix. \n\n Housing Density (DEN4) \n1) Less than one house per 20 acres\n2) One house per 20 acres to one house per 5 acres\n3) More than one house per 5 acres to 1 house per acre\n4) More than 1 house per acre\n\nFire Hazard Severity Zone (HAZ_NUM: 1=Moderate, 2=High, 3=Very High) \nSource: State Resposibility Areas (fhszs06_3), Local Responsibility Areas (fhszl11_1)", "description": "

Wildland Urban Interface, Wildland Urban Intermix, and Wildfire Influence Zones developed by FRAP for the FRAP 2015 Assessment. <\/SPAN><\/P>

This dataset is derived from several data sources, including housing density (input_lsn_HousingDensity12_2), Fire Hazard Severity Zones (FHSZ_Assessment11_1), Unimproved Parcels (input_UnimprovedParcels16_1) , and Vegetation Cover (input_FVEG15_2).<\/SPAN><\/P>

Spatially accurate representation of the nexus between development and wildfire is underpinned in this dataset by the use of Landscan 2012. Assessment dataset input_lsn_HousingDensity12_2 has four housing density classes: Specifically, remote sensed night time light emissions (Conus Night) data is converted to points, summarized into projected 90m grid cells using methods guided by the West Wide Wildfire Risk Assessment Final Report - Addendum I Detailed Technical Methods, March 31, 2013. The data is then resampled to 30m for consistency with other Assessment data products.<\/SPAN><\/P>

Housing Density Classes (DEN4) used in the WUI definitions: <\/SPAN><\/P>

Class Definition<\/SPAN><\/P>

1 Less than one house per 20 acres<\/SPAN><\/P>

2 One house per 20 acres to one house per 5 acres<\/SPAN><\/P>

3 More than one house per 5 acres to 1 house per acre<\/SPAN><\/P>

4 More than 1 house per acre<\/SPAN><\/P>

Interface: <\/SPAN><\/P>

  • DEN4 Class 2, 3 or 4 <\/SPAN><\/P><\/LI>

  • In Moderate, High, or Very High Fire Hazard Severity Zone<\/SPAN><\/P><\/LI>

  • Not dominated by wildland vegetation (i.e., Lifeform not Herbaceous, Hardwood, Conifer or Shrub according to dataset input_FVEG15_2 )<\/SPAN><\/P><\/LI>

  • Spatially contiguous groups of 30m cells that are 10 acres and larger<\/SPAN><\/P><\/LI><\/UL>

    Intermix:<\/SPAN><\/P>

    • Not Interface<\/SPAN><\/P><\/LI>

    • DEN4 Class 2<\/SPAN><\/P><\/LI>

    • DEN4 Class 3, 4 dominated by wildland vegetation<\/SPAN><\/P><\/LI>

    • In Moderate, High or Very High Fire Hazard Severity Zone<\/SPAN><\/P><\/LI>

    • Improved Parcels only<\/SPAN><\/P><\/LI>

    • Spatially contiguous groups of 30m cells 25 acres and larger<\/SPAN><\/P><\/LI><\/UL>

      Wildfire Influence Zone<\/SPAN><\/P>

      • Wildland vegetation up to 1.5 miles from Interface or Intermix<\/SPAN><\/P><\/LI><\/UL>

        Fire Hazard Severity Zones:<\/SPAN><\/P>

        PRC 4201 - 4204 and Govt. Code 51175-89 direct the California Department of Forestry and Fire Protection (CAL FIRE) to map areas of significant fire hazards based on fuels, terrain, weather, and other relevant factors. These zones, referred to as Fire Hazard Severity Zones (FHSZ), define the application of various mitigation strategies to reduce risk associated with wildland fires. CAL FIRE is remapping Fire Hazard Severity Zones (FHSZ) for State Responsibility Areas (SRA) and Very High Fire Hazard Severity Zones (VHFHSZ) recommendations in Local Responsibility Areas (LRA) to provide updated map zones, based on new data, science, and technology. Offical \"Maps of Fire Hazard Severity Zones in the State Responsibility Area of California\" are provided as required by Public Resources Code 4201-4204 and entitled in the California Code of Regulation, Title 14, Section 1280 Fire Hazard Severity Zones, and as adopted by CAL FIRE on November 7, 2007. Maps of the adopted zones in SRA are available at: http://frap.cdf.ca.gov/projects/hazard/fhz.html. More information about the project can be found at: http://frap.cdf.ca.gov/projects/hazard/hazard.html.<\/SPAN><\/P>

        Fire Hazard Severity Zone is designated by the HAZ_NUM field, where 1=Moderate, 2=High, 3=Very High (SRA), 4=Very High (LRA). Source: State Resposibility Areas: fhszs06_3; Local Responsibility Areas: fhszl11_1).<\/SPAN><\/P>

        <\/P>

        <\/P>

        <\/P>

        <\/DIV><\/DIV><\/DIV>", "summary": "This dataset adds housing density class (DEN4) and wildfire hazard (FHSZ) attributes to WUI12_2 - FRAP\u2019s preliminary result in an effort to capture Wildland Urban Interface (WUI) for the 2015 Assessment. The current dataset is appropriate for displaying the overall pattern of WUI development at the county level, and comparing counties in terms of development patterns. Until the dataset is refined through a field review process, it is not suited for WUI designations for individual houses or neighborhoods. \n\nThree WUI classes are mapped: \n1) Wildland Urban Interface \u2013 dense housing adjacent to vegetation that can burn in a wildfire,\n2) Wildland Urban Intermix - housing development interspersed in an area dominated by wildland vegetation subject to wildfire, and \n3) Wildfire Influence Zone - wildfire susceptible vegetation up to 1.5 miles from Wildland Urban Interface or Wildland Urban Intermix. \n\n Housing Density (DEN4) \n1) Less than one house per 20 acres\n2) One house per 20 acres to one house per 5 acres\n3) More than one house per 5 acres to 1 house per acre\n4) More than 1 house per acre\n\nFire Hazard Severity Zone (HAZ_NUM: 1=Moderate, 2=High, 3=Very High) \nSource: State Resposibility Areas (fhszs06_3), Local Responsibility Areas (fhszl11_1)", "title": "Wildland Urban Interface, Intermix, and Wildfire Influence Zones - with Housing Density and Hazard Class (WUI12_3)", "tags": [ "Wildfire", "Houses" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 150000000, "maxScale": 5000, "spatialReference": "", "accessInformation": "California Department of Forestry and Fire Protection, Fire and Resource Assessment Program (FRAP)", "licenseInfo": "

        DISCLAIMER: The State of California and the Department of Forestry and Fire Protection make no representations or warranties regarding the accuracy of data or maps. The user will not seek to hold the State or the Department liable under any circumstances for any damages with respect to any claim by the user or any third party on account of or arising from the use of data or maps. There are no restrictions on distribution of the data by users. However, users are encouraged to refer others to the Department of Forestry and Fire Protection to acquire the data, in case updated data become available. <\/SPAN><\/SPAN><\/P>

        The user will cite the California Department of Forestry and Fire Protection as the original source of the data, but will clearly denote cases where the original data have been altered, updated, or in any way changed from the original condition. <\/SPAN><\/SPAN><\/P>

        <\/P><\/DIV><\/DIV><\/DIV>", "portalUrl": "" }