Probabilistic Wildfire Risk Flame Length Probability 2 CONUS (Image Service)

National data on burn probability (BP) and conditional flame-length probability (FLP) were generated for the conterminous United States (CONUS), Alaska, and Hawaii using a geospatial Fire Simulation (FSim) system developed by the USDA Forest Service Missoula Fire Sciences Laboratory. The FSim system includes modules for weather generation, wildfire occurrence, fire growth, and fire suppression. FSim is designed to simulate the occurrence and growth of wildfires under tens of thousands of hypothetical contemporary fire seasons in order to estimate the probability of a given area (i.e., pixel) burning under current landscape conditions and fire management practices. The data presented here represent modeled BP and FLPs for the United States (US) at a 270-meter grid spatial resolution. Flame-length probability is estimated for six standard Fire Intensity Levels. The six FLPs correspond to flame-length classes as follows: FLP1 = < 2 feet (ft); FLP2 = 2 < 4 ft.; FLP3 = 4 < 6 ft.; FLP4 = 6 < 8 ft.; FLP5 = 8 < 12 ft.; FLP6 = 12+ ft. Because they indicate conditional probabilities (i.e., representing the likelihood of burning at a certain intensity level, given that a fire occurs), the FLP data must be used in conjunction with the BP data for risk assessment.This record was taken from the USDA Enterprise Data Inventory that feeds into the https://data.gov catalog. Data for this record includes the following resources: ISO-19139 metadata ArcGIS Hub Dataset ArcGIS GeoService For complete information, please visit https://data.gov.

美国全国范围内的燃烧概率（BP）和条件火焰长度概率（FLP）数据，针对北美大陆、阿拉斯加及夏威夷地区，已通过美国农业部林务局密苏拉火灾科学实验室研发的地理空间火灾模拟系统（FSim）生成。FSim系统集成了天气生成、野火发生、火灾蔓延及火灾抑制等模块。该系统旨在模拟在数万个假设的现代火灾季节下野火的产生与蔓延，以估算在当前景观条件和火灾管理措施下特定区域（即像素）的燃烧概率。此处提供的数据为美国在270米网格空间分辨率下的模拟BP和FLP。火焰长度概率针对六个标准的火灾强度等级进行估算。六个FLP分别对应火焰长度等级如下：FLP1 = < 2英尺（ft）；FLP2 = 2 < 4 ft；FLP3 = 4 < 6 ft；FLP4 = 6 < 8 ft；FLP5 = 8 < 12 ft；FLP6 = 12+ ft。由于FLP数据表示的是条件概率（即表示在发生火灾的条件下，燃烧在某一强度等级的可能性），因此在使用这些数据进行风险评估时，必须与BP数据结合使用。该记录源自美国农业部企业数据目录，并输入至https://data.gov目录。该记录的数据包括以下资源：ISO-19139元数据、ArcGIS Hub数据集、ArcGIS GeoService。如需完整信息，请访问https://data.gov。