California Historical Fire Perimeters

Name: California Historical Fire Perimeters
Creator: California State Geoportal
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California State Geoportal2026-03-28 收录

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The California Department of Forestry and Fire Protection's Fire and Resource Assessment Program (FRAP) annually maintains and distributes an historical wildland fire perimeter dataset from across public and private lands in California. The GIS data is developed with the cooperation of the United States Forest Service Region 5, the Bureau of Land Management, California State Parks, National Park Service and the United States Fish and Wildlife Service and is released in the spring with added data from the previous calendar year. Although the dataset represents the most complete digital record of fire perimeters in California, it is still incomplete, and users should be cautious when drawing conclusions based on the data.  This data should be used carefully for statistical analysis and reporting due to missing perimeters (see Use Limitation in metadata). Some fires are missing because historical records were lost or damaged, were too small for the minimum cutoffs, had inadequate documentation or have not yet been incorporated into the database. Other errors with the fire perimeter database include duplicate fires and over-generalization. Additionally, over-generalization, particularly with large old fires, may show unburned "islands" within the final perimeter as burned. Users of the fire perimeter database must exercise caution in application of the data. Careful use of the fire perimeter database will prevent users from drawing inaccurate or erroneous conclusions from the data. This data is updated annually in the spring with fire perimeters from the previous fire season. This dataset may differ in California compared to that available from the National Interagency Fire Center (NIFC) due to different requirements between the two datasets. The data covers fires back to 1878.  As of May 2026, it represents firep25_1. Please help improve this dataset by filling out this survey with feedback:<a target='_blank' href='https://survey123.arcgis.com/share/b296589b82af45f1ad9298d11a2fb5d3?portalUrl=https://CALFIRE-Forestry.maps.arcgis.com' rel='nofollow ugc noopener noreferrer'>Historical Fire Perimeter Dataset Feedback</a> Current criteria for data collection are as follows:CAL FIRE (including contract counties) submit perimeters ≥10 acres in timber, ≥50 acres in brush, or ≥300 acres in grass, and/or ≥3 impacted residential or commercial structures, and/or caused ≥1 fatality.All cooperating agencies submit perimeters ≥10 acres.  Version update:<p style='background-color:rgb(255, 255, 255); color:rgb(76, 76, 76); font-family:"Segoe UI", Arial, sans-serif; font-size:13.3333px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin-bottom:11px; margin-right:0px; margin-top:0px; padding-bottom:1em; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>Firep25_1 was released in April 2026. Five hundred sixteen fires from the 2025 fire season were added to the database (42 from BLM, 264 from CAL FIRE, 65 from Contract Counties, 62 from Local Responsibility Area, 7 from NPS, 68 from USFS and 7 from USFW). Eleven fires were added from 2016–2024, not previously published. One duplicate record was removed (1984 HURRICANE). One perimeter was identified as a controlled burn and moved to the rxburn25_1 dataset (1987 PEPPERTREE CONTROLLED). Five perimeters were replaced with more accurate geometry. A count of 12,097 fires' collection methods were edited from Null values to Unknown. Another 78 records had attributes updated.<p style='background-color:rgb(255, 255, 255); color:rgb(76, 76, 76); font-family:"Segoe UI", Arial, sans-serif; font-size:13.3333px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin-bottom:11px; margin-right:0px; margin-top:0px; padding-bottom:1em; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>A new field, Global ID, was added to provide a unique ID to track all fire records in this dataset including those pre-dating IRWIN IDs.<p style='background-color:rgb(255, 255, 255); color:rgb(76, 76, 76); font-family:"Segoe UI", Arial, sans-serif; font-size:13.3333px; font-style:normal; font-variant-caps:normal; font-variant-ligatures:normal; font-weight:400; letter-spacing:normal; margin-bottom:11px; margin-right:0px; margin-top:0px; padding-bottom:1em; text-align:left; text-decoration-color:initial; text-decoration-style:initial; text-indent:0px; text-transform:none; word-spacing:0px;'>The following fires were identified as meeting our collection criteria but are not included in this version and will hopefully be added in a future update: Tule (2025-CATIA-000654).Includes separate layers filtered by criteria as follows:California Fire Perimeters (All): Unfiltered. The entire collection of wildfire perimeters in the database.  It is scale dependent and starts displaying at the country level scale. Recent Large Fire Perimeters (≥5000 acres): Filtered for wildfires greater or equal to 5,000 acres for the last 5 years of fires (2021–2025), symbolized with color by year and is scale dependent and starts displaying at the country level scale. Year-only labels for recent large fires.California Fire Perimeters (1950+):  Filtered for wildfires that started in 1950–2025.  Symbolized by decade, and display starting at country level scale. Detailed metadata is included in the following documents:<p style='background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; line-height:normal;'><a target='_blank' href='https://calfire-forestry.maps.arcgis.com/home/item.html?id=93a1f8cc1456497f86ecd25933e6c9b9' rel='nofollow ugc noopener noreferrer'>Wildland Fire Perimeters Metadata</a>See more information on our Living Atlas data release here: <a target='_blank' href='https://www.esri.com/arcgis-blog/products/arcgis-living-atlas/decision-support/cal-fire-historical-fire-perimeters-available-in-arcgis-living-atlas' rel='nofollow ugc noopener noreferrer'>CAL FIRE Historical Fire Perimeters Available in ArcGIS Living Atlas</a>For any questions, please contact the data steward:Kim Wallin, GIS SpecialistCAL FIRE, Fire & Resource Assessment Program (FRAP)kimberly.wallin@fire.ca.gov

加州林业和消防保护局（California Department of Forestry and Fire Protection）下属的火灾与资源评估项目（Fire and Resource Assessment Program, FRAP）每年维护并发布覆盖加州公私土地的历史野过火边界数据集。该地理信息系统（Geographic Information System, GIS）数据由美国林务局第5区、土地管理局、加州州立公园、国家公园管理局及美国鱼类和野生动物管理局合作开发，于每年春季发布上一历年的新增数据。尽管该数据集是加州现有最完整的过火边界数字化记录，但仍存在缺失，使用者基于该数据推导结论时需保持谨慎。由于存在过火边界缺失情况（详见元数据中的使用限制），该数据在用于统计分析与报告时需格外小心。部分火灾未被纳入的原因包括：历史记录丢失或损坏、过火面积小于最小阈值、记录材料不足，或尚未被录入数据库。过火边界数据库还存在其他问题，如重复火灾记录、过火范围过度泛化。其中，大型老旧火灾的过度泛化可能会将过火边界内部未燃烧的“孤岛”区域标记为已燃烧区域。过火边界数据库的使用者务必谨慎使用数据，合理使用可避免得出不准确或错误的结论。该数据集每年春季更新，纳入上一火季的过火边界数据。由于两套数据集的要求不同，本数据集与美国国家跨部门火灾中心（National Interagency Fire Center, NIFC）发布的加州相关数据可能存在差异。本数据集覆盖1878年以来的火灾记录，截至2025年5月，其版本为fire24_1。请填写本问卷提交反馈，助力改进本数据集：<a target="_blank" href="https://survey123.arcgis.com/share/b296589b82af45f1ad9298d11a2fb5d3?portalUrl=https://CALFIRE-Forestry.maps.arcgis.com" rel="nofollow ugc noopener noreferrer">历史过火边界数据集反馈问卷</a> 当前数据收集标准如下：加州林业和消防保护局（California Department of Forestry and Fire Protection, CAL FIRE，含签约县）需提交符合以下任一条件的过火边界：林地过火面积≥10英亩、灌丛过火面积≥50英亩、草地过火面积≥300英亩，或造成≥3处受影响的住宅/商业建筑，或导致≥1人死亡。所有合作机构需提交过火面积≥10英亩的过火边界。  版本更新说明：Firep24_1于2025年4月发布。本次更新共纳入2024火季的548起火灾记录（其中印第安事务局2起、土地管理局56起、加州林业和消防保护局197起、签约县193起、区域资源办公室27起、国家公园管理局8起、美国林务局55起、美国鱼类和野生动物管理局8起）。作为特殊情况，因2025年1月发生异常火灾潮，本次更新额外纳入6起2025火季的过火边界记录。本次更新移除了5起重复火灾记录，用更精准的过火边界替换了2023年Sage火灾的原有记录。共有900条过火边界完成属性更新：其中705条移除了火灾名称字段末尾的“FIRE”字样，148条将COMPLEX_ID字段中的Complex IRWIN ID替换为Complex本地事件编号。以下3起符合收集标准的火灾未纳入本版本，有望在后续更新中加入：Addie（2024-CACND-002119）、Alpaugh（2024-CACND-001715）、South（2024-CATIA-001375）。另有1条过火边界缺少封控日期，将在下一版本更新中补充。本次编制流程新增了交叉核对加州火灾报告系统（CALFIRS）提交的新加州林业和消防保护局数据的环节，以确保起火原因分类的准确性。同时将“Powerline”对应的起火原因分类域描述更新为“Electrical Power（电力）”，以更全面覆盖各类起火原因报告。  本数据集包含按标准筛选的独立图层，详情如下：加州过火边界（全部）：未经过滤，包含数据库中所有野火过火边界记录。该图层受比例尺限制，在国家级别比例尺下开始显示。近期大型过火边界（≥5000英亩）：筛选2020年1月至2025年1月期间发生的过火面积≥5000英亩的野火，按火灾发生年份着色显示。该图层受比例尺限制，在国家级别比例尺下开始显示，仅显示火灾年份标签。加州过火边界（1950年至今）：筛选1950年1月至2025年1月期间发生的野火，按火灾发生的十年分组进行符号化显示。该图层受比例尺限制，在国家级别比例尺下开始显示。 详细元数据包含在以下文档中：<p style="background-attachment:initial; background-clip:initial; background-image:initial; background-origin:initial; background-position:initial; background-repeat:initial; background-size:initial; line-height:normal;"><a target="_blank" href="https://calfire-forestry.maps.arcgis.com/home/item.html?id=93a1f8cc1456497f86ecd25933e6c9b9" rel="nofollow ugc noopener noreferrer">野过火边界数据集（Firep24_1）元数据</a>如需了解更多ArcGIS Living Atlas数据发布相关信息，请访问：<a target="_blank" href="https://www.esri.com/arcgis-blog/products/arcgis-living-atlas/decision-support/cal-fire-historical-fire-perimeters-available-in-arcgis-living-atlas" rel="nofollow ugc noopener noreferrer">加州林业和消防保护局历史过火边界数据现已上架ArcGIS Living Atlas</a>如有任何疑问，请联系数据管理员：Kim Wallin，地理信息系统专员加州林业和消防保护局，火灾与资源评估项目（FRAP）kimberly.wallin@fire.ca.gov

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