Forest Inventory and Analysis Above Ground Forest Biomass (Image Service)

This Biomass and Carbon per Acre dataset was compiled for the 48-state CONUS Area in order to identify local, state and regional trends in forest cover and landscape composition. It can be used as a graphic, as inputs to GIS overlay procedures, or to summarize average or total amounts of forest attributes within analysis areas of interest. Through application of a nearest-neighbor imputation approach, mapped estimates of forest biomass density were developed for the contiguous United States using the annual forest inventory conducted by the USDA Forest Service Forest Inventory and Analysis (FIA) program, MODIS satellite imagery, and ancillary geospatial datasets. This data product contains the following 7 raster maps: Aboveground Forest Biomass, Belowground Forest Biomass, Forest Tree Bole Biomass, Forest Sapling Biomass, Forest Stump Biomass, Forest Top Biomass, Woodland Species Biomass. All layers have a 250 meter pixel resolution and values represent biomass pounds per acre. The paper on which these maps are based may be found here: https://dx.doi.org/10.2737/RDS-2013-0004 Access to full metadata and other information can be accessed here: https://dx.doi.org/10.2737/RDS-2013-0004本单位英亩生物量与碳数据集专为美国本土48州（CONUS）区域编制，旨在识别森林覆盖与景观构成的地方、州级及区域尺度变化趋势。该数据集可作为可视化图形素材、地理信息系统（GIS）叠加分析流程的输入数据，亦可用于汇总目标分析区域内森林属性的平均或总量数值。本数据集通过应用最近邻插补法，依托美国农业部（USDA）森林服务局森林清查与分析（FIA）计划开展的年度森林清查数据、中分辨率成像光谱仪（MODIS）卫星影像及辅助地理空间数据集，生成了美国本土连续区域的森林生物量密度制图估算结果。本数据产品包含以下7幅栅格地图：森林地上生物量、森林地下生物量、林木树干生物量、幼树生物量、树桩生物量、林分上层生物量以及林地物种生物量。所有图层的像素分辨率均为250米，图层数值以磅/英亩为单位表示生物量。上述制图所依托的研究论文可通过以下链接获取：https://dx.doi.org/10.2737/RDS-2013-0004；完整元数据及其他相关信息亦可通过该链接获取：https://dx.doi.org/10.2737/RDS-2013-0004