Fire atlas for the Crown of the Continent Ecosystem (Glacier National Park, Great Bear Wilderness, Bob Marshall Wilderness, and Scapegoat Wilderness)

This fire atlas includes all 1972-2012 wildland fires at least 20 hectares (ha) or 50 acres in size that occurred within or intersected the Crown of the Continent Ecosystem in Montana, which is comprised of Glacier National Park, Great Bear Wilderness, Bob Marshall Wilderness, and Scapegoat Wilderness. There are two main components of this fire atlas; the first being a fire history shapefile depicting fire perimeters, and the second being raster files representing satellite-inferred burn severity for these fires. For fires that occurred from 1972 to 1983, burn severity is measured as dNDVI (delta normalized difference vegetation index), which is calculated using Landsat multi-spectral scanner (MSS) data. For fires that occurred between 1984 and 2012, burn severity is measured as dNBR (delta normalized burn ratio), RBR (relativized burn ratio), and dNDVI (delta normalized difference vegetation index), which are calculated using Landsat TM (thematic mapper), ETM+ (enhanced thematic mapper plus), and OLI (operational land imager) data.
This fire atlas was created for a project funded by the Joint Fire Science Program (JFSP) titled "Quantifying the effectiveness and longevity of wildland fire as a fuel treatment" (JFSP 12-1-03-19). To conduct this study, constantly generated fire history (vector dataset depicting fire perimeters) and fire severity (raster datasets depicting satellite-inferred metrics of severity) were needed for all fires greater than or equal to 20 hectares between 1972 and 2012.
Original metadata date was 08/03/2015. Minor metadata updates on 12/19/2016.

本火灾地图集涵盖了1972年至2012年间，发生在蒙大拿州大陆生态系统王冠区（Crown of the Continent Ecosystem）范围内或与其相交的所有面积不小于20公顷（ha）或50英亩的野外火灾。该区域包含冰川国家公园、大贝尔荒野（Great Bear Wilderness）、鲍勃·马歇尔荒野（Bob Marshall Wilderness）以及斯科佩戈特荒野（Scapegoat Wilderness）。
本火灾地图集包含两大核心组成部分：其一为火灾历史形状文件（shapefile），用于呈现火灾过火边界；其二为栅格文件，用于表征基于卫星反演的上述火灾的火烧烈度。
针对1972年至1983年发生的火灾，其火烧烈度采用dNDVI（差值归一化植被指数，delta normalized difference vegetation index）进行度量，该指数通过陆地卫星多光谱扫描仪（MSS）数据计算得到。针对1984年至2012年发生的火灾，其火烧烈度分别采用dNBR（差值归一化燃烧指数，delta normalized burn ratio）、RBR（相对燃烧比率，relativized burn ratio）以及dNDVI（差值归一化植被指数，delta normalized difference vegetation index）进行度量，上述指数均通过陆地卫星专题制图仪（TM，thematic mapper）、增强型专题制图仪Plus（ETM+，enhanced thematic mapper plus）以及陆地卫星业务陆地成像仪（OLI，operational land imager）数据计算得到。
本火灾地图集是为联合火灾科学项目（Joint Fire Science Program, JFSP）资助的一项题为"量化野外火灾作为燃料处理措施的有效性与持久性"（项目编号JFSP 12-1-03-19）的研究项目制作的。为开展该项研究，研究团队需要获取1972年至2012年间所有面积不小于20公顷的火灾的持续更新的火灾历史数据（用于表征火灾过火边界的矢量数据集）以及火灾烈度数据（用于表征基于卫星反演的烈度指标的栅格数据集）。
该数据集的原始元数据日期为2015年8月3日，后于2016年12月19日进行了小幅元数据更新。