US Fish and Wildlife Service Fire Atlas- Burned Areas Boundaries for 1983-2014

The U. S. Fish and Wildlife Service (FWS) requests burn severity assessments through an agreement with the U.S. Geological Survey (USGS) to be completed by analysts with the Monitoring Trends in Burn Severity (MTBS) Program. These data products are burned area boundary shapefiles derived from post-fire sensor data (including Landsat TM, Landsat ETM+, Landsat OLI). The pre-fire and post-fire subsets included were used to create Normalized Burn Ratio (NBR) and then a differenced Normalized Burn Ratio (dNBR) image. The objective of this assessment was to generate burned area boundaries for each fire. Data bundles also include post-fire subset, pre-fire subset, NBR, and dNBR images. This map layer contains burned areas boundaries of the location of all currently inventoried fires occurring between calendar year 1983 and 2014. Fires omitted from this mapped inventory are those where suitable satellite imagery was not available, or fires which were not discernable from available imagery.

美国鱼类及野生动物管理局（U.S. Fish and Wildlife Service, FWS）通过与美国地质调查局（U.S. Geological Survey, USGS）签订的协议，委托火灾严重程度监测趋势项目（Monitoring Trends in Burn Severity, MTBS）的分析师开展火烧烈度评估工作。该数据集产品为基于灾后传感器数据（涵盖陆地卫星专题制图仪Landsat TM、陆地卫星增强型专题制图仪加Landsat ETM+、陆地卫星陆地成像仪Landsat OLI）提取的火烧区域边界矢量Shapefile。研究人员利用本次纳入的灾前与灾后影像子集，先生成归一化燃烧指数（Normalized Burn Ratio, NBR）影像，再进一步构建差值归一化燃烧指数（differenced Normalized Burn Ratio, dNBR）影像。本次评估的核心目标为为每起火灾生成对应的火烧区域边界。本数据套件还包含灾后影像子集、灾前影像子集、NBR影像与dNBR影像。本地图图层包含1983至2014日历年期间所有已登记普查的火灾的火烧区域边界。未被纳入本制图普查范围的火灾包括两类：一是无合格卫星影像可用的火灾，二是无法通过现有影像识别的火灾。